|
|
|
|
|
|
by harshmap
4163 days ago
|
|
|
"Influenza occurs globally with an annual attack rate estimated at 5%–10% in adults and 20%–30% in children. Illnesses can result in hospitalization and death mainly among high-risk groups (the very young, elderly or chronically ill). Worldwide, these annual epidemics are estimated to result in about 3 to 5 million cases of severe illness, and about 250 000 to 500 000 deaths." http://www.who.int/mediacentre/factsheets/fs211/en/ |
|
|