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Flu is a respiratory infection caused by a number of viruses. The viruses pass through the air and enter your body through your nose or mouth. Between 5% and 20% of people in the U.S. get the flu each year. The flu can be serious or even deadly for elderly people, newborn babies, and people with certain chronic illnesses.
Symptoms of the flu come on suddenly and are worse than those of the common cold. They may include
Most people with the flu recover on their own without medical care. People with mild cases of the flu should stay home and avoid contact with others, except to get medical care. If you get the flu, your health care provider may prescribe medicine to help your body fight the infection and lessen symptoms.
The main way to keep from getting the flu is to get a yearly flu vaccine. Good hygiene, including hand washing, can also help.
NIH: National Institute of Allergy and Infectious Diseases
|Definition (NCI)||An acute viral infection of the respiratory tract, occurring in isolated cases, in epidemics, or in pandemics; it is caused by serologically different strains of viruses (influenzaviruses) designated A, B, and C, has a 3-day incubation period, and usually lasts for 3 to 10 days. It is marked by inflammation of the nasal mucosa, pharynx, and conjunctiva; headache; myalgia; often fever, chills, and prostration; and occasionally involvement of the myocardium or central nervous system.(from Dorland)|
|Definition (CSP)||acute viral infection involving the respiratory tract; marked by inflammation of the nasal mucosa, the pharynx, and conjunctiva, and by headache and severe, often generalized, myalgia.|
|Definition (MSH)||An acute viral infection in humans involving the respiratory tract. It is marked by inflammation of the NASAL MUCOSA; the PHARYNX; and conjunctiva, and by headache and severe, often generalized, myalgia.|
|Concepts||Disease or Syndrome (T047)|
|SnomedCT||155562009, 195931008, 155559006, 266353003, 266393000, 6142004|
|English||Grippe, Influenza, Influenzas, INFLUENZA, influenza (diagnosis), influenza, Flu syndrome, Syndrome flu, Influenza, Human [Disease/Finding], Influenzae, flu syndrome, flus, flu, influenzas, grippe, Influenza NOS, Influenza NOS (disorder), Flu, Influenza (disorder), Influenza, NOS, Flu, Human, Human Flu, Human Influenzas, Human Influenza, Influenza in Humans, Influenza in Human, Influenza, Human, Influenzas, Human|
|Spanish||gripe, influenza, gripe (trastorno), Síndrome gripal, Influenza en Humanos, influenza (trastorno), gripe, SAI (trastorno), gripe, SAI, Influenza, Gripe, Gripe Humana, Influenza Humana|
|Dutch||syndroom griep, griepsyndroom, Influenza, griep|
|French||Syndrome de grippe, Grippe, Grippe humaine, Grippe chez l'homme|
|German||Grippesyndrom, Syndrom Grippe, Grippe, Influenza|
|Italian||Sindrome di influenza, Sindrome influenzale, Influenza|
|Portuguese||Síndrome gripal, Influenza em Humanos, Influenza Humana, Gripe, Gripe Humana|
|Russian||ГРИПП ЧЕЛОВЕКА, ГРИПП, INFLIUENTSA, GRIPP, GRIPP CHELOVEKA, ИНФЛЮЭНЦА|
|Japanese||インフルエンザ症候群, ｲﾝﾌﾙｴﾝｻﾞｼｮｳｺｳｸﾞﾝ, ｲﾝﾌﾙｴﾝｻﾞ, インフルエンザ-ヒト, インフルエンザ, ヒトインフルエンザ, 流感, 流行性感冒|
|Czech||chřipka, chřipka lidská, Chřipkový syndrom, Chřipka|
|Croatian||GRIPA, INFLUENCA, HUMANA|
|Polish||Grypa azjatycka, Grypa ludzka|
|Hungarian||influenza, Influenza, nátha syndroma|