20世纪的流感大流行 Credit:US National Museum of Health and Medicine 1918:"Spanish Flu" 1957:"Asian Flu" 1968:“Hong Kong Flu" 1-4 million deaths 1-4 million deaths 20-40 million deaths A(H2N2) A(H3N2) A(H1N1) 1957.2,中国首发 20世纪的流感大流行 1918: “Spanish Flu” 1957: “Asian Flu” 1968: “Hong Kong Flu” 20-40 million deaths A(H1N1) 1-4 million deaths A(H2N2) 1957.2,中国首发 1-4 million deaths A(H3N2) Credit: US National Museum of Health and Medicine