Seropositivity rates of different HFMD-associated enteroviruses in the whole of China along with the Chengdu and Kunming areas, 2013–2020. (a) Seropositivity rates of different HFMD-associated enteroviruses in the whole of China, 2013–2019. The data in the figure are cited from [26]. (b) Seropositivity rates of different HFMD-associated enteroviruses in Chengdu, Sichuan province, China. The data in the figure are cited from [27]. (c) Seropositivity rate of different HFMD-associated enteroviruses before EV-A71 inactivated vaccine vaccination in Kunming, Yunnan Province, China. The data in the figure are cited from [28]. (d) Seropositivity rate of different HFMD-associated enteroviruses after EV-A71 inactivated vaccine in Kunming, Yunnan Province, China. The data in the figure are cited from [29].