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Influenza



Influenza Causes


Influenza viruses are grouped into three types, designated A, B, and C. Influenza types A and B are responsible for epidemics of respiratory illness that arise almost every winter and are often associated with increased rates of hospitalization and death.


Influenza Definition


Influenza, more commonly known as "the flu," is an illness caused by viruses that infect the respiratory tract. Compared with most other viral respiratory infections, such as the common cold, influenza infection often leads to a more severe illness with a mortality rate (death rate) of about 0.1% of people who are infected with the virus.


Influenza Diagnosis


Secretions from the throat or nose can be used to make a definitive diagnosis of influenza.


Influenza Symptoms and Signs


Common symptoms include: body aches, especially joints and throat; coughing and sneezing; extreme coldness and fever; fatigue; headache; irritated watering eyes; nasal congestion; reddened eyes, skin (especially face), mouth, throat and nose; and abdominal pain (in children with Influenza B). Although nausea, vomiting, and diarrhea can sometimes accompany influenza infection, especially in children, gastrointestinal symptoms are rarely seen. The term "stomach flu" is a misnomer that is occasionally used to describe gastrointestinal illnesses caused by other microorganisms.


Influenza Treatment


Much of the illness and death caused by influenza can be prevented by a yearly influenza vaccination. Flu vaccine is specifically recommended for those who are at high risk for developing serious complications as a consequence of influenza infection.


Drugs used for treatment of Influenza


Amantadine

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