Flu vaccine worked well in season that faded fast, CDC says

Early estimates suggest the flu vaccine performed well in a U.S. winter flu season that has already dissipated. The vaccines were more than 40% effective in preventing adults from getting sick enough from the flu that they had to go to a doctor’s office, clinic or hospital, health officials said during a Centers for Disease Control and Prevention vaccines meeting Wednesday. Officials generally are pleased if a flu vaccine is 40% to 60% effective.

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