WHO: Up to 2 Billion may get H1N1 Virus; up to one-third of the population gets infected. Fukuda says it’s impossible to say if the current strain of swine flu will become severe or mild. Other flu experts say Fukuda’s estimate is possible, because of unknowns about how a flu virus mutates. The WHO raised its global total of laboratory-confirmed cases to 2,099 from 1,893 late Wednesday. It takes five to seven days before people notice symptoms, says Dr. Widdowson.”]
Source: https://www.bankinfosecurity.com/who-up-to-2-billion-may-get-h1n1-virus-a-1452