INFLUENZA VIRUSES ISOLATED BY
WHO/NREVSS Collaborating Laboratories
2011 - 2012 Season
Week A(H1) A(2009 H1N1) A(H3) A(unable to sub-type) A(Subtyping not performed) B Total # Tested % Positive
40 0 3 12 0 9 9 2781 1.19
41 0 0 5 0 3 8 2819 0.57
42 0 2 8 0 9 8 2992 0.9
43 0 0 10 0 17 11 3261 1.17
44 0 0 15 0 9 9 3408 0.97
45 0 2 11 0 15 15 3444 1.25
46 0 0 12 0 16 8 3192 1.13
47 0 1 6 0 26 7 2130 1.88

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