What is Flu?
- "Flu" is an illness caused by several influenza viruses.
- Last year influenza A (H1N1) was the most common cause for the illness, with influenza B as the next type responsible for the epidemic in the USA.
- Without immunization, the illness starts suddenly and causes fever, muscle aches, weakness, congestion and cough and usually lasts 5 days.
For more details go to: http://cdc.gov/flu/keyfacts.htm