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Flu

What is the flu?

The flu, also called influenza, is a respiratory infection caused by viruses. Each year, millions of Americans get sick with the flu. Sometimes it causes mild illness. But it can also be serious or even deadly, especially for people over 65, newborn babies, and people with certain chronic illnesses.

What causes the flu?

The flu is caused by flu viruses that spread from person to person. When someone with the flu coughs, sneezes, or talks, they spray tiny droplets. These droplets can land in the mouths or noses of people who are nearby. Less often, a person may get flu by touching a surface or object that has flu virus on it and then touching their own mouth, nose, or possibly their eyes.

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Results 1 - 10 of 2,409 for influenza
  1. Flu (National Library of Medicine)  
    What is the flu? The flu, also called influenza, is a respiratory infection caused by viruses. Each year, millions of Americans get sick with the flu. Sometimes ...
  2. Bird Flu (National Library of Medicine)  
    What is bird flu? Birds, just like people, can get the flu. Another name for bird flu is avian influenza. The viruses that ...
  3. H1N1 Flu (Swine Flu) (National Library of Medicine)  
    Swine flu is an infection caused by a virus. It's named for a virus that pigs can get. People do not normally get swine flu, but human infections can and do happen. In ...
  4. Flu Shot (National Library of Medicine)  
    Flu is a respiratory infection caused by a number of viruses. Most people with the flu get better on their own. But it can ... cause complications and sometimes even death. Getting the flu vaccine every year is the best way to ...
  5. Flu (Influenza) Test What is a Flu (Influenza) Test? Flu is short for influenza, a respiratory infection caused by a virus . A flu test helps your health care provider ...
  6. Gastroenteritis (National Library of Medicine)  
    ... rotaviruses. Some people call viral gastroenteritis the "stomach flu." But this name is not medically correct. It is not caused by flu viruses. The flu is a respiratory infection that ...
  7. Flu 
    The flu (influenza) is a viral respiratory illness that causes fever, chills, runny nose, body aches, and cough. It spreads easily ...
  8. ... Nasal congestion Sneezing Sore throat Cough Headache The flu is an infection of the nose, throat, and lungs caused by the influenza virus. COVID-19 is an illness that can ...
  9. ... Nasal congestion Runny nose Sneezing Sore throat The flu is an infection of the nose, throat, and lungs caused by the influenza virus. Many flu symptoms are similar to those ...
  10. The H1N1 virus (swine flu) is an infection of the nose, throat, and lungs. It is caused by the H1N1 influenza virus. ... The H1N1 virus is now considered a regular flu virus. It is one of the three viruses ...
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