China has been declared malaria-free by the World Health Organization Dong Xueshu, an 86-year-old researcher with the Yunnan Institute of Parasitic Diseases in Yunnan Province, has been studying mosquitoes for seven decades.Dong’s research started in 1956, when a malaria epidemic broke out in Menghai, a county in Xishuangbanna Dai Autonomous Prefecture, Yunnan.
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