Figure 2
From: Implementation of Influenza-like illness Sentinel Surveillance in Togo
Monthly distribution of number of samples collected and influenza viruses confirmed, Togo, April 2010-December 2012. The influenza positivity rate was 26% in May and 30% in October and corralated with the presence of the pandemic influenza A (H1N1) pdm09 in 2010. In 2011 year, the influenza B became predominant and representing 93% of all viruses detected in May. During the same year, a second peak of ILI was observed and corralated with the seasonal influenza A/H3N2 in October. From this month, there was a co-circulation of influenza type A and type B.