Fig. 1From: Circulation and seasonality of influenza viruses in different transmission zones in AfricaCirculating influenza virus types and subtypes in African influenza transmission areas from 2013 to 2019. Note that pH1 is A(H1N1)pdm2009; H3 is A(H3N2); Ans is A not subtyped; Byam is the B Yamagata virus; Bvic is the B Victoria virus; and Bind is the B virus with undetermined lineageBack to article page