Why this year’s flu vaccine may only be 20% effective
Canadian scientists report the flu vaccine is less than 20 percent effective against the flu's most dominant strain, H3N2. But why is the flu vaccine less effective than usual?
FOX NEWS: Why this year’s flu vaccine may only be 20% effective
Why this year’s flu vaccine may only be 20% effective
Canadian scientists report the flu vaccine is less than 20 percent effective against the flu's most dominant strain, H3N2. But why is the flu vaccine less effective than usual?
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