RT @MiriamETucker: Of 644 U.S. #flu viruses tested at #CDC since 10-1-10, 13% are A(H1N1), 54% A(H3N2), and 33% B. #ACIP
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RT @MiriamETucker: Of 644 U.S. #flu viruses tested at #CDC since 10-1-10, 13% are A(H1N1), 54% A(H3N2), and 33% B. #ACIP