LOS ANGELES, Dec. 6 (Xinhua) -- The updated flu shots generated this year seem to be "a very good match" for the most prevalent strains of influenza, said Director of the U.S. Centers for Disease Control and Prevention (CDC) Rochelle Walensky.
"We look in real time as to how well we think the influenza match is to what's circulating. And right now, the good news is that it looks like it is a very good match," said Walensky on Monday.
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