Browse A-Z

More <
bookmarks-menu

Flu

Show Alternative Names
Influenza A
Influenza B
Oseltamivir (Tamiflu) - flu
Zanamivir (Relenza) - flu
Vaccine - flu

The flu (influenza) is a viral respiratory illness that causes fever, chills, runny nose, body aches, and cough. It spreads easily from person to person. The flu can cause moderate to severe symptoms. Most people recover fully. Children, older adults, and people with certain health conditions are at risk for severe illness and even death.

Flu - Animation

Your head is throbbing. Your throat is burning. You're coughing nonstop, and your whole body aches. This is no run-of-the-mill cold. You may have the flu. Let's talk about influenza, also known as the flu. Winter is a time for sledding, snowball fights, and flu. Every winter, millions of Americans come down with this respiratory ailment and feel absolutely miserable. Like the common cold, the flu is caused by a virus. But with the flu, it's the influenza virus that makes people so sick. The flu virus comes in a few different forms. Influenza A is most common between early winter and spring. You can catch influenza B year-round. Swine flu, or H1N1, is a specific type of influenza A. You catch the flu from someone who has it. When people with the flu sneeze or cough, they send a spray of droplets filled with the flu virus into the air. If you're unlucky enough to be nearby, you could breathe in those droplets. Or, you might touch a surface that the droplets have fallen on and then touch your nose or mouth. Two to three days later, the first flu symptoms will appear. Usually you'll start running a fever. Then you'll feel achy and tired. You may have the chills and feel sick to your stomach. After a couple of days, the sore throat and cough will set in. So, how do doctors treat the flu? Because a virus causes the flu, antibiotics won't treat it, they only kill bacteria. There are antiviral medicines, but you need to start taking them within the first 2 days after your symptoms appear. Until the illness runs its course, help yourself feel better by getting a lot of rest and drinking extra fluids. You can take an over-the-counter cold medicine to relieve your congestion and cough. Tylenol, Advil, or Motrin can bring down your fever and take some of the pain out of your sore throat. Aspirin isn't recommended during the flu, especially under age 18, because it could increase the risk for a rare, but serious, condition called Reye syndrome. By itself, the flu usually isn't harmful. But it can make existing conditions like asthma and breathing problems worse. In older people or those with a weakened immune system, the flu can turn into pneumonia, bronchitis, and other more serious diseases. For most healthy people, the flu is a short-term annoyance. They're stuck in bed for a week or two, and then their symptoms go away and they're back up and around. But thousands of people each year get very sick from the flu, especially the elderly, young children, and pregnant women. Many are hospitalized, and about 36,000 people die from flu complications. To avoid getting the flu, eat well, get plenty of exercise and sleep, and practice good hygiene. Wash your hands often with warm water and soap or use an alcohol-based hand sanitizer. Don't share cups, plates, or utensils, especially during flu season. And most effective, get your flu shot every fall to protect you through the whole flu season.

Causes

The flu is caused by an influenza virus.

Most people get the flu when they breathe in tiny airborne droplets from the coughs or sneezes of someone who has the flu. You can also catch the flu if you touch something with the virus on it, and then touch your mouth, nose, or eyes.

People often confuse colds, flu, and COVID-19. They are different, but they do have some of the same symptoms. Most people get a cold several times a year. In contrast, people generally get the flu only once every few years. Cold symptoms tend to be more mild compared to the flu and COVID-19. The flu and COVID-19 share many symptoms, so it can be hard to tell them apart. The best way to know is to get tested. COVID-19 self-tests are available over-the-counter at most pharmacies. If needed, your health care provider can test you for the flu.

The flu spreads easily. It can affect a large group of people in a very short amount of time. For example, students and co-workers often get sick within 2 or 3 weeks of the flu's arrival in a school or workplace.

The difference between a cold and the flu - Animation

So what's the difference between cold and flu. The two words go together like salt and pepper or like New Year's and weight loss. I'm Dr. Alan Greene and I want to help you figure out what the difference is. Most people have a general idea that they are different, but when pressed have a hard time really saying what the difference is. The cold, the common cold, is something very common you usually get on average 3 or more times during a year. And it is a virus that's primarily in the nose. The cold is focused in the nose. The 3 main symptoms of a cold are sneezing, nasal stuffiness, and runny nose. All are focused in the nose. You may have other symptoms - you may have a fever of 100, 101, maybe you may have some tickling or scratchiness in the back of the throat. In fact, that may be the very first symptom - a little scratch in the back of the throat. Then after a couple days the nasal discharge tends to turn a little bit darker, greener. And then after about a week you're all the way better. But it's focused in the head, focused in the nose. With the flu you're sick all over. It's a whole body disease. It's a much more serious illness. The flu in the United States today still kills about 36,000 people a year. Mostly people who already are weak for some reason or another. But it's a serious illness. And it usually slams into you with a fever. Typically the fever is in the 102 all the way up to a 106 range. A higher fever often the first symptom and you feel sick all over. You have muscle aches, you're tired, you feel out of it, you really feel crummy. And after a couple of days the respiratory symptoms start to come too. And depending where the flu virus settles you might have some sneezing, you might have some coughing. The classic symptom is a dry, hacking kind of cough, could be wheezing, could be other things, but the cough is the most common. Then it's there also for around 7 days or so and then at the end of it you may have another peak of fatigue and a second peak of fever. But usually after about a week you'll start feeling better with most cases of the flu. Colds and flus are very, very different illnesses with a few of the same symptoms.

Sometimes, you can get a virus that makes you throw up or have diarrhea. Some people call this the "stomach flu." This is a misleading name because this virus is usually not the actual flu. The flu mostly affects your nose, throat, and lungs.

While certain people are at a higher risk, anyone at any age can develop serious complications from the flu. Those at highest risk include:

  • People age 65 and older
  • Children younger than 5 years old
  • Women who are more than 3 months pregnant
  • Anyone living in a long-term care facility
  • Anyone with chronic heart, lung, or kidney conditions, diabetes, or a weakened immune system
  • People with severe obesity (BMI of 40 or higher)

Test Your Flu Prevention Knowledge

  • Which are common ways to catch the flu?

    Correct Answer
    The correct answer is B and C. The best lifestyle change you can make to help prevent the flu is to wash your hands often.
  • Which of the following helps protect you from the flu?

    Correct Answer
    The correct answer is all of the above. Washing your hands often helps stop the spread of germs. Eating a healthy diet and getting enough sleep help boost your immune system so you’re less likely to get sick.
  • Which of the following is NOT a symptom of the flu:

    Correct Answer
    The correct answer is diarrhea. The flu causes symptoms in the nose, throat, and lungs. If you are experiencing flu symptoms, you should avoid contact with other people.
  • How long do flu symptoms last?

    Correct Answer
    The correct answer is longer than 1 week. Fever and aches begin to go away between 2 and 4 days after getting the flu. Sneezing, dry cough, runny nose, and sore throat may continue for several days. You may feel tired for weeks. Get plenty of rest and drink a lot of fluids while you’re recovering from the flu.
  • Which of the following is NOT a treatment for the flu?

    Correct Answer
    The correct answer is antibiotics. Antibiotics kill bacteria. They do not help fight viruses, and the flu is caused by a virus. Taking antibiotics when they are not needed increases your risk of getting an infection later that can't be treated with antibiotics. Don't ask your doctor for antibiotics when you have the flu.
  • How can you prevent spreading the flu when you’re sick?

    Correct Answer
    The correct answer is all of the above. If you get the flu, do all you can to prevent the virus from spreading to friends, loved ones, and strangers.
  • You can get vaccinated for the flu with a nasal spray.

    Correct Answer
    The correct answer is true. There are two types of flu vaccines: a flu shot and a nasal spray. The nasal spray is called FluMist. It uses a live, weakened virus instead of a dead one. If you are 2 to 49 years old, and are not pregnant, you may use this vaccine. Talk to your doctor about whether FluMist is right for you.
  • When is the best time to get the flu vaccine?

    Correct Answer
    The correct answer is in October. The CDC recommends everyone 6 months and older receive the flu vaccine. You should get the vaccine at the start of flu season (around October in the U.S.). Getting the vaccine as late as March may still help.
  • Which of the following are side effects of the flu vaccine?

    Correct Answer
    The correct answer is both A and B. Most people have no side effects from the flu shot. Others may notice soreness at the injection site, minor aches, and low-grade fever for a few days after the shot. Talk to your doctor if you have concerns about getting a flu shot.
  • Who should NOT receive a flu vaccine?

    Correct Answer
    The correct answer is people who are sick and have a fever. If you have a fever or other illness, you should talk to your doctor before getting vaccinated. The CDC and most doctors recommend waiting until you are healthy to get the vaccine.
  • Washing your hands thoroughly is the best lifestyle change you can make to help prevent the flu.

    Correct Answer
    The correct answer is true. Washing your hands often and carefully is the best lifestyle change you can make to help prevent the flu. You should wash your hands with soap and warm water for 15 to 20 seconds, about the time it takes to sing the Happy Birthday song twice.

Symptoms

Flu symptoms often start quickly. You can start to feel sick about 1 to 7 days after you come in contact with the virus. Most of the time, symptoms appear within 2 to 3 days.

The first symptom is often a fever between 100°F (37.8°C) and 104°F (40°C). An adult often has a lower fever than a child. But not everyone with the flu has a fever.

Other common symptoms include:

Fever usually goes away in 3 to 4 days but may last up to 8 days. Other symptoms get better in 7 to 14 days. The cough and tired feeling may last for weeks. Sometimes, the fever comes back.

Some people may not feel like eating.

The flu can make asthma, breathing problems, and other long-term (chronic) illnesses and conditions worse.

Exams and Tests

Most people do not need to see a health care provider when they have flu symptoms. This is because most people are not at risk for a severe case of the flu.

If you are very sick with the flu, or you are at high risk for severe illness, you should contact your provider.

There is a test to detect the flu. It is done by swabbing the nose or throat. Most of the time, test results are available very fast. The test can help your provider determine the best treatment.

Treatment

HOME CARE

Acetaminophen (Tylenol) and ibuprofen (Advil, Motrin) help lower fever and relieve aches. Providers sometimes suggest that you use both types of medicine. Aspirin can also reduce fever and aches, but it may have potential serious side effects, such as stomach bleeding. So it’s best to avoid using aspirin and it should never be given to treat flu in someone age 18 or less.

Tips on buying cold and flu medicines - Animation

They call it the common cold for a reason. Colds are extraordinarily common. Children average 3 to 8 colds a year and adults almost that many. I'm doctor Alan Greene and I want to give you a couple of tips about navigating the cold and flu aisle at the drug store. Many of the offerings that are there will offer relief in several different ways. They may have a decongestant in there to try to reduce nasal congestion. An antihistamine that may help a bit with sleep or may also help with some congestion. They may have a cough suppressant in there to make you cough less. An expectorant to make your cough more productive, so you can cough things out easier and may have something to bring down a temperature or relieve aches and pains, like acetaminophen, or ibuprofen. But if you pick-up more than one of these, it's pretty common for people to double-up on a specific ingredient. So, if you're using more than one, look at the ingredient list. You don't want to see the same thing on both. For instance, if you have the decongestant pseudoephedrine on two different lists, the double-dose is not good for you and doesn't add any extra help. But beyond that, you don't even want to find the same action in two different multisymptom things. So if you have, taking a decongestant, you don't want a decongestant in the other one, whatever kind of decongestant it is. And as reminder for kids under 6, decongestants, antihistamines, and cough suppressants have not been shown to help them any better than placebo and do have some side-effects. So, I don't recommend them at all for kids under 6.

A fever does not need to come all the way down to a normal temperature to make a difference in how a person feels. Most people feel better when the temperature drops by 1 degree Fahrenheit.

Here are other ways to relieve symptoms:

  • Over-the-counter cold medicines may make some of your symptoms better.
  • Cough drops or throat sprays will help with your sore throat.
  • Get plenty of rest.
  • Drink plenty of liquids.
  • Do not smoke or drink alcohol.

Certain medicines should not be given to children, or only after a certain age.

  • Do not give cold medicines to children younger than 4 years old.
  • Only give cold medicines to children ages 4 to 6 years if your health care provider recommends it.
  • Do not give ibuprofen to children younger than 6 months unless directed by your provider.
  • Aspirin should not be used in children and teens due to the risk of Reye syndrome.

ANTIVIRAL DRUGS

Most people with milder symptoms do not need to see a provider or take antiviral medicines. Your provider may recommend antiviral treatment if you are very sick with the flu. You also may be given antivirals if you are at risk for serious illness. Children at risk for a severe case of the flu may also need these medicines.

The health problems below may increase the risk of getting sicker with the flu:

  • Being younger than age 5 years (those under age 2 are even more at risk) or age 65 or older
  • Lung disease (including asthma)
  • Heart conditions (except high blood pressure)
  • Kidney, liver, nerve, and muscle conditions
  • Blood disorders (including sickle cell disease)
  • Diabetes
  • A weakened immune system due to diseases (such as AIDS), radiation therapy, or certain medicines, including chemotherapy and corticosteroids
  • Neurological diseases such as cerebral palsy, epilepsy, intellectual disability, and muscular dystrophy
  • Other long-term medical problems

These medicines may shorten the time you have symptoms by about 1 day. They work better if you start taking them within 2 days of your first symptoms.

Antibiotics are NOT used to treat the flu. Antibiotics kill bacteria. They won't work on the viruses that cause the flu.

Outlook (Prognosis)

Millions of people in the United States get the flu each year. Most people get better within a week or two, but thousands of people with the flu develop pneumonia or a brain infection. They may need to stay in the hospital. About 21,000 people in the United States die each year of problems from the flu.

Possible Complications

Complications may include:

When to Contact a Medical Professional

Contact your provider if you or your child get the flu and are at risk for having complications.

Also contact your provider if flu symptoms are very bad and not getting better.

Contact your provider right away if you or your child have:

  • Difficulty breathing
  • High fever
  • Shortness of breath

Any breathing problems are an emergency. Seek medical help right away. 

Prevention

You can take steps to avoid catching or spreading the flu. The best step is for everyone age 6 months and older to get a flu vaccine. There are two types:

Influenza (flu) vaccine (live, intranasal): This vaccine is a nasal spray. People ages 2 through 49 years who are not pregnant may receive LAIV.

Influenza (flu) vaccine (inactivated or recombinant): This vaccine is delivered by injection. Everyone 6 months and older can get the vaccine.

To help prevent spreading the flu when you are sick, stay home and away from others both inside and outside your household

  • As much as possible, stay in a specific room and away from others in your home. Use a separate bathroom if you can.
  • Keep track of your symptoms. You may receive instructions from your provider on how to check and report your symptoms.
  • Wear a well-fitted face mask or respirator that fits well over your nose and mouth without gaps when you see your health care provider and anytime other people are in the same room with you. If you can't wear a mask, for example, due to breathing problems, people in your home should wear a mask if they need to be in the same room with you.
  • Cover your mouth and nose with a tissue or your sleeve (not your hands) when coughing or sneezing. Throw away the tissue after use.
  • Wash your hands many times a day with soap and running water for at least 20 seconds. Do this before eating or preparing food, after using the toilet, and after coughing, sneezing, or blowing your nose. Use an alcohol-based hand sanitizer (at least 60% alcohol) if soap and water are not available.
  • Do not share personal items such as cups, eating utensils, towels, or bedding. Wash anything you have used in soap and water.
  • Clean all "high-touch" areas in the home, such as doorknobs, bathroom and kitchen fixtures, toilets, phones, tablets, counters, and other surfaces. Use a household cleaning spray and follow instructions for use.
  • Take steps for cleaner air in your home. You can do this by opening windows, turning on exhaust fans in your bathrooms and kitchen, using portable high-efficiency particulate air (HEPA) cleaners, and setting the fan on your furnace or air conditioning to "on" if you have central heating and cooling in your home.

You can go back to your normal activities if both of the following things are true:

  • For at least 24 hours, you have been feeling better and your symptoms are improving AND
  • You have not had a fever for at least 24 hours (and you are not using fever-reducing medicine)

Even though you feel better, you may still be able to spread the virus to others for several days. For this reason, once you go back to your normal activities, continue to protect others from illness by taking these steps for 5 days:

  • Practice good hygiene
  • Take steps for cleaner air
  • Wear a mask around others
  • Practice physical distancing by avoiding close contact and avoiding crowds

If your fever returns after resuming normal activities, you should go back to staying home and away from others. Once your fever and symptoms improve for more than 24 hours, you can resume activities while taking steps to protect others for 5 more days.

Review Date: 8/15/2022

Reviewed By

Linda J. Vorvick, MD, Clinical Professor, Department of Family Medicine, UW Medicine, School of Medicine, University of Washington, Seattle, WA. Internal review and update on 07/12/2023 by David C. Dugdale, MD, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team. Editorial update 03/12/2024.

References

Aoki FY. Antiviral drugs for influenza and other respiratory virus infections. In: Bennett JE, Dolin R, Blaser MJ, eds. Mandell, Douglas, and Bennett's Principles and Practice of Infectious Diseases. 9th ed. Philadelphia, PA: Elsevier; 2020:chap 45.

Centers for Disease Control and Prevention website. Burden of flu: past seasons estimated influenza disease burden. www.cdc.gov/flu/about/burden/past-seasons.html. Updated February 28, 2024. Accessed March 11, 2024.

Centers for Disease Control and Prevention website. Influenza (flu): flu symptoms & complications. www.cdc.gov/flu/symptoms/symptoms.htm. Updated October 3, 2022. Accessed March 11, 2024.

Centers for Disease Control and Prevention website. Influenza: seasonal flu vaccines. www.cdc.gov/flu/prevent/flushot.htm. Updated August 25, 2023. Accessed March 11, 2024.

Centers for Disease Control and Prevention website. Influenza (flu): what are flu antiviral drugs. www.cdc.gov/flu/treatment/whatyoushould.htm. Updated February 7, 2024. Accessed March 11, 2024.

Centers for Disease Control and Prevention website. Respiratory illnesses: preventing spread of respiratory viruses when you’re sick. www.cdc.gov/respiratory-viruses/prevention/precautions-when-sick.html. Updated March 1, 2024. Accessed March 11, 2024.

Centers for Disease Control and Prevention website. Seasonal flu: key facts about influenza (flu). www.cdc.gov/flu/about/keyfacts.htm. Updated October 24, 2022. Accessed March 11, 2024.

Havers FP, Campbell AJP. Influenza viruses. In: Kliegman RM, St. Geme JW, Blum NJ, Shah SS, Tasker RC, Wilson KM, eds. Nelson Textbook of Pediatrics. 21st ed. Philadelphia, PA: Elsevier; 2020:chap 285.

Ison MG, Lee N. Influenza. In: Goldman L, Cooney KA, eds. Goldman-Cecil Medicine. 27th ed. Philadelphia, PA: Elsevier; 2024:chap 332.

Treanor JJ. Influenza viruses, including avian influenza and swine influenza. In: Bennett JE, Dolin R, Blaser MJ, eds. Mandell, Douglas, and Bennett's Principles and Practice of Infectious Diseases. 9th ed. Philadelphia, PA: Elsevier; 2020:chap 165.

Disclaimer

The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. A licensed medical professional should be consulted for diagnosis and treatment of any and all medical conditions. Links to other sites are provided for information only -- they do not constitute endorsements of those other sites. No warranty of any kind, either expressed or implied, is made as to the accuracy, reliability, timeliness, or correctness of any translations made by a third-party service of the information provided herein into any other language. © 1997- A.D.A.M., a business unit of Ebix, Inc. Any duplication or distribution of the information contained herein is strictly prohibited.

All
Videos
Images
Tips on buying cold and flu medicines

Tips on buying cold and flu medicines

Animation

The difference between a cold and the flu

The difference between a cold and the flu

Animation

Flu

Flu

Animation

Normal lung anatomy - Illustration Thumbnail

Normal lung anatomy

Within the respiratory system, air is first inhaled through the nose or mouth into the pharynx. From the pharynx, air is drawn through the larynx and trachea to make its way to the lungs.

Illustration

Influenza - Illustration Thumbnail

Influenza

Influenza is a viral infection of the respiratory tract that causes coughing, breathing difficulty, fever, headache, muscle aches and weakness. The virus is spread from person to person by inhaling infected droplets from the air.

Illustration

Nasal spray flu vaccine - Illustration Thumbnail

Nasal spray flu vaccine

The flu vaccine can also be administered as a nasal spray instead of the usual injection method. It can be an alternative for healthy, non-pregnant people age 2 to 49 who want to be protected from the flu virus. Unlike the regular vaccine, it is a live virus. Therefore, it is best if the person receiving it does not have close contact with people who have a weakened immune system.

Illustration

 
Tips on buying cold and flu medicines

Tips on buying cold and flu medicines

Animation

The difference between a cold and the flu

The difference between a cold and the flu

Animation

Flu

Flu

Animation

 
Normal lung anatomy - Illustration Thumbnail

Normal lung anatomy

Within the respiratory system, air is first inhaled through the nose or mouth into the pharynx. From the pharynx, air is drawn through the larynx and trachea to make its way to the lungs.

Illustration

Influenza - Illustration Thumbnail

Influenza

Influenza is a viral infection of the respiratory tract that causes coughing, breathing difficulty, fever, headache, muscle aches and weakness. The virus is spread from person to person by inhaling infected droplets from the air.

Illustration

Nasal spray flu vaccine - Illustration Thumbnail

Nasal spray flu vaccine

The flu vaccine can also be administered as a nasal spray instead of the usual injection method. It can be an alternative for healthy, non-pregnant people age 2 to 49 who want to be protected from the flu virus. Unlike the regular vaccine, it is a live virus. Therefore, it is best if the person receiving it does not have close contact with people who have a weakened immune system.

Illustration

 
##RemoveMe##
 

Tips on buying cold and flu medicines - Animation

They call it the common cold for a reason. Colds are extraordinarily common. Children average 3 to 8 colds a year and adults almost that many. I'm doctor Alan Greene and I want to give you a couple of tips about navigating the cold and flu aisle at the drug store.

Many of the offerings that are there will offer relief in several different ways. They may have a decongestant in there to try to reduce nasal congestion. An antihistamine that may help a bit with sleep or may also help with some congestion. They may have a cough suppressant in there to make you cough less. An expectorant to make your cough more productive, so you can cough things out easier and may have something to bring down a temperature or relieve aches and pains, like acetaminophen, or ibuprofen.

But if you pick-up more than one of these, it's pretty common for people to double-up on a specific ingredient. So, if you're using more than one, look at the ingredient list. You don't want to see the same thing on both. For instance, if you have the decongestant pseudoephedrine on two different lists, the double-dose is not good for you and doesn't add any extra help. But beyond that, you don't even want to find the same action in two different multisymptom things. So if you have been taking a decongestant, you don't want a decongestant in the other one, whatever kind of decongestant it is.

And as a reminder for kids under 6, decongestants, antihistamines, and cough suppressants have not been shown to help them any better than placebo and do have some side-effects. So, I don't recommend them at all for kids under 6.

 

The difference between a cold and the flu - Animation

So what's the difference between cold and flu. The two words go together like salt and pepper or like New Year's and weight loss. I'm Dr. Alan Greene and I want to help you figure out what the difference is. Most people have a general idea that they are different, but when pressed have a hard time really saying what the difference is. The cold, the common cold, is something very common you usually get on average 3 or more times during a year. And it is a virus that's primarily in the nose. The cold is focused in the nose. The 3 main symptoms of a cold are sneezing, nasal stuffiness, and runny nose. All are focused in the nose. You may have other symptoms - you may have a fever of 100°, 101°, maybe you may have some tickling or scratchiness in the back of the throat. In fact, that may be the very first symptom - a little scratch in the back of the throat. Then after a couple days the nasal discharge tends to turn a little bit darker, greener. And then after about a week you're all the way better. But it's focused in the head, focused in the nose.

With the flu you're sick all over. It's a whole body disease. It's a much more serious illness. The flu in the United States today still kills about 36,000 people a year. Mostly people who already are weak for some reason or another. But it's a serious illness. And it usually slams into you with a fever. Typically the fever is in the 102° all the way up to a 106° range. A higher fever often the first symptom and you feel sick all over. You have muscle aches, you're tired, you feel out of it, you really feel crummy. And after a couple of days the respiratory symptoms start to come too. And depending where the flu virus settles you might have some sneezing, you might have some coughing. The classic symptom is a dry, hacking kind of cough, could be wheezing, could be other things, but the cough is the most common. Then it's there also for around 7 days or so and then at the end of it you may have another peak of fatigue and a second peak of fever. But usually after about a week you'll start feeling better with most cases of the flu.

Colds and flus are very, very different illnesses with a few of the same symptoms.

 

Flu - Animation

Your head is throbbing. Your throat is burning. You're coughing nonstop, and your whole body aches. This is no run-of-the-mill cold. You may have the flu. Let's talk about influenza, also known as the flu.

Winter is a time for sledding, snowball fights, and flu. Every winter, millions of Americans come down with this respiratory ailment and feel absolutely miserable.

Like the common cold, the flu is caused by a virus. But with the flu, it's the influenza virus that makes people so sick. The flu virus comes in a few different forms. Influenza A is most common between early winter and spring. You can catch influenza B year-round. Swine flu, or H1N1, is a specific type of influenza A.

You catch the flu from someone who has it. When people with the flu sneeze or cough, they send a spray of droplets filled with the flu virus into the air. If you're unlucky enough to be nearby, you could breathe in those droplets. Or, you might touch a surface that the droplets have fallen on and then touch your nose or mouth.

Two to three days later, the first flu symptoms will appear. Usually you'll start running a fever. Then you'll feel achy and tired. You may have the chills and feel sick to your stomach. After a couple of days, the sore throat and cough will set in.

So, how do doctors treat the flu?

Because a virus causes the flu, antibiotics won't treat it, they only kill bacteria. There are antiviral medicines, but you need to start taking them within the first 2 days after your symptoms appear.

Until the illness runs its course, help yourself feel better by getting a lot of rest and drinking extra fluids. You can take an over-the-counter cold medicine to relieve your congestion and cough. Tylenol, Advil, or Motrin can bring down your fever and take some of the pain out of your sore throat. Aspirin isn't recommended during the flu, especially under age 18, because it could increase the risk for a rare, but serious, condition called Reye syndrome.

By itself, the flu usually isn't harmful. But it can make existing conditions like asthma and breathing problems worse. In older people or those with a weakened immune system, the flu can turn into pneumonia, bronchitis, and other more serious diseases.

For most healthy people, the flu is a short-term annoyance. They're stuck in bed for a week or two, and then their symptoms go away and they're back up and around. But thousands of people each year get very sick from the flu, especially the elderly, young children, and pregnant women. Many are hospitalized, and about 36,000 people die from flu complications.

To avoid getting the flu, eat well, get plenty of exercise and sleep, and practice good hygiene. Wash your hands often with warm water and soap or use an alcohol-based hand sanitizer. Don't share cups, plates, or utensils, especially during flu season. And most effective, get your flu shot every fall to protect you through the whole flu season.

 

Tips on buying cold and flu medicines - Animation

They call it the common cold for a reason. Colds are extraordinarily common. Children average 3 to 8 colds a year and adults almost that many. I'm doctor Alan Greene and I want to give you a couple of tips about navigating the cold and flu aisle at the drug store.

Many of the offerings that are there will offer relief in several different ways. They may have a decongestant in there to try to reduce nasal congestion. An antihistamine that may help a bit with sleep or may also help with some congestion. They may have a cough suppressant in there to make you cough less. An expectorant to make your cough more productive, so you can cough things out easier and may have something to bring down a temperature or relieve aches and pains, like acetaminophen, or ibuprofen.

But if you pick-up more than one of these, it's pretty common for people to double-up on a specific ingredient. So, if you're using more than one, look at the ingredient list. You don't want to see the same thing on both. For instance, if you have the decongestant pseudoephedrine on two different lists, the double-dose is not good for you and doesn't add any extra help. But beyond that, you don't even want to find the same action in two different multisymptom things. So if you have been taking a decongestant, you don't want a decongestant in the other one, whatever kind of decongestant it is.

And as a reminder for kids under 6, decongestants, antihistamines, and cough suppressants have not been shown to help them any better than placebo and do have some side-effects. So, I don't recommend them at all for kids under 6.

 

The difference between a cold and the flu - Animation

So what's the difference between cold and flu. The two words go together like salt and pepper or like New Year's and weight loss. I'm Dr. Alan Greene and I want to help you figure out what the difference is. Most people have a general idea that they are different, but when pressed have a hard time really saying what the difference is. The cold, the common cold, is something very common you usually get on average 3 or more times during a year. And it is a virus that's primarily in the nose. The cold is focused in the nose. The 3 main symptoms of a cold are sneezing, nasal stuffiness, and runny nose. All are focused in the nose. You may have other symptoms - you may have a fever of 100°, 101°, maybe you may have some tickling or scratchiness in the back of the throat. In fact, that may be the very first symptom - a little scratch in the back of the throat. Then after a couple days the nasal discharge tends to turn a little bit darker, greener. And then after about a week you're all the way better. But it's focused in the head, focused in the nose.

With the flu you're sick all over. It's a whole body disease. It's a much more serious illness. The flu in the United States today still kills about 36,000 people a year. Mostly people who already are weak for some reason or another. But it's a serious illness. And it usually slams into you with a fever. Typically the fever is in the 102° all the way up to a 106° range. A higher fever often the first symptom and you feel sick all over. You have muscle aches, you're tired, you feel out of it, you really feel crummy. And after a couple of days the respiratory symptoms start to come too. And depending where the flu virus settles you might have some sneezing, you might have some coughing. The classic symptom is a dry, hacking kind of cough, could be wheezing, could be other things, but the cough is the most common. Then it's there also for around 7 days or so and then at the end of it you may have another peak of fatigue and a second peak of fever. But usually after about a week you'll start feeling better with most cases of the flu.

Colds and flus are very, very different illnesses with a few of the same symptoms.

 

Flu - Animation

Your head is throbbing. Your throat is burning. You're coughing nonstop, and your whole body aches. This is no run-of-the-mill cold. You may have the flu. Let's talk about influenza, also known as the flu.

Winter is a time for sledding, snowball fights, and flu. Every winter, millions of Americans come down with this respiratory ailment and feel absolutely miserable.

Like the common cold, the flu is caused by a virus. But with the flu, it's the influenza virus that makes people so sick. The flu virus comes in a few different forms. Influenza A is most common between early winter and spring. You can catch influenza B year-round. Swine flu, or H1N1, is a specific type of influenza A.

You catch the flu from someone who has it. When people with the flu sneeze or cough, they send a spray of droplets filled with the flu virus into the air. If you're unlucky enough to be nearby, you could breathe in those droplets. Or, you might touch a surface that the droplets have fallen on and then touch your nose or mouth.

Two to three days later, the first flu symptoms will appear. Usually you'll start running a fever. Then you'll feel achy and tired. You may have the chills and feel sick to your stomach. After a couple of days, the sore throat and cough will set in.

So, how do doctors treat the flu?

Because a virus causes the flu, antibiotics won't treat it, they only kill bacteria. There are antiviral medicines, but you need to start taking them within the first 2 days after your symptoms appear.

Until the illness runs its course, help yourself feel better by getting a lot of rest and drinking extra fluids. You can take an over-the-counter cold medicine to relieve your congestion and cough. Tylenol, Advil, or Motrin can bring down your fever and take some of the pain out of your sore throat. Aspirin isn't recommended during the flu, especially under age 18, because it could increase the risk for a rare, but serious, condition called Reye syndrome.

By itself, the flu usually isn't harmful. But it can make existing conditions like asthma and breathing problems worse. In older people or those with a weakened immune system, the flu can turn into pneumonia, bronchitis, and other more serious diseases.

For most healthy people, the flu is a short-term annoyance. They're stuck in bed for a week or two, and then their symptoms go away and they're back up and around. But thousands of people each year get very sick from the flu, especially the elderly, young children, and pregnant women. Many are hospitalized, and about 36,000 people die from flu complications.

To avoid getting the flu, eat well, get plenty of exercise and sleep, and practice good hygiene. Wash your hands often with warm water and soap or use an alcohol-based hand sanitizer. Don't share cups, plates, or utensils, especially during flu season. And most effective, get your flu shot every fall to protect you through the whole flu season.

 
 
 
 

 

 
 

 
© 1997-ADAM Company Logo All rights reserved.