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Table 2 Distribution of number of samples collected and influenza positivity rate by year, Togo, April 2010-December 2012

From: Implementation of Influenza-like illness Sentinel Surveillance in Togo

      Subtypes of influenza A
Years Total n Positive cases n (%) Influenza B n (%) Influenza A n (%) A/H3N2 n (%) A(H1N1) pdm09 n (%) A/Unsubtypeable n (%)
April to December 2010 87 28 (32.2) 3 (3.4) 25 (28.7) 3 (3.4) 21 (24.1) 1 (1.1)
2011 335 88 (26.3) 49 (14.6) 39 (11.6) 17 (5.1) 20 (5.9) 2 (0.6)
2012 533 120 (22.5) 48 (9.0) 72 (13.5) 51 (9.5) 21 (3.9) 0 (0.0)
Total 955 236 (24.7) 100 (10.5) 136 (14.2) 71(7.4) 62 (6.5) 3 (0.3)