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INFLUENZA VIRUSES ISOLATED BY
WHO/NREVSS Collaborating Laboratories
2012 - 2013 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	71	0	10	79	4316	3.78
41	0	7	67	0	25	98	4684	4.21
42	0	4	125	0	47	121	4978	5.97
43	0	3	147	0	49	139	4861	6.95
44	0	4	180	0	73	151	5109	7.99
45	0	5	267	0	114	229	6038	10.19
46	0	8	360	0	211	262	6272	13.44
47	0	7	549	0	406	359	6979	18.93
48	0	17	935	0	507	482	8517	22.79
49	0	36	1631	0	915	647	10839	29.79
50	0	36	2048	0	1146	680	12526	31.22
51	0	12	970	0	586	278	6234	29.61