Explain Antivirals Don't Help the Flu in Most Patients

Patients will ask about problems with this year's flu vaccine and whether they need an antiviral if they get the flu.

Influenza A H3N2 is the most common strain circulating now...and it has mutated since the vaccine was formulated.

That's why this season's flu vaccine is only about 23% effective in the U.S...and likely even less effective in Canada.

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