Table 1. Surveillance for Influenza-like-Illness in and around Delhi, North India, 2007–2010.

Year	# Tested	Influenza positive		Influenza B		Seasonal Influenza A				Influenza A(H1N1)pdm09
						H3N2		H1N1
		n	%	N	%*	n	%*	n	%*	n	%*
2007	710	55	8	27	49	1	2	27	49	NA	NA
2008	822	55	7	46	84	6	11	3	5	NA	NA
2009	1071	315	29	28	9	110	35	15	5	162	51
2010	661	116	17	51	44	6	5	0	0	59	51
Total	3264	541	17	152	28	123	23	45	8	221	41

*Denominator for the percentage is # influenza positive for that year.