US health authorities recommend an annual vaccine to protect against influenza. This year's campaign to encourage vaccination was met on social media with renewed misleading claims about ingredients in the shot, most of which are not present; others help improve the effectiveness of the jab and have been tested for safety, experts say.
CDC releases new clinical details in cases of unusual hepatitis in children ktvz.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from ktvz.com Daily Mail and Mail on Sunday newspapers.