how soon after exposure do flu symptoms begin
Best Answer: What you want to do is to look at studies where healthy volunteers are purposely infected with influenza virus by dripping it into their noses - how long after that exposure do symptoms start? mild symptoms occur at 24 hours. but symptoms are severe by 48 hours after exposure. if you want to get better a LOT faster, and have a much milder illness, you need to take oseltamivir - but it must be started within the first 48 hours of symptoms in order to have benefit. see ...