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Table 4 Periods of high influenza activity, 2010–2018

From: Seasonal influenza vaccination in Kenya: an economic evaluation using dynamic transmission modelling

Year NH season Subtype Vaccine match SH season Subtype Vaccine match
Jan 2010–Aug 2010     03/2010–12/2010 A(H3N2) M
2010–2011 12/2010–08/2011 B M 08/2011–03/2012 B M
2011–2012 12/2011–05/2012 A(H3N2) U    
2012–2013     05/2013–12/2013 B M
2013–2014 12/2013–09/2014 A(H1N1)pdm09 M    
2015–2016 11/2015–05/2016 B M 03/2016–11/2016 A(H3N2) U
2017–2018 09/2017–06/2018 B U 06/2018–12/2018 A(H3N2)* U
  01/2018–10/2018 A(H1N1)pdm09 M    
  1. An influenza year begins in September and ends in August the following year. “M” means the vaccine was well matched to circulating strains (VE = 70%) [16]. “U” means vaccine was poorly matched to circulating strains (VE = 42%) [16]. Blank cells indicate no detectable peak in influenza activity. *There were no SH VE estimates available at the time, and we used VE values for the NH vaccine