天花是世界上最古老的疾病之一（埃及拉美西斯五世在公元前1157年去世，有着明显的天花症状），它在20世纪使全球3亿人丧命。
One of the oldest diseases in the world ( Ramesses V of Egypt , who died in 1157 B.C.E. apparently had it ) , smallpox killed 300 million people worldwide in the 20th century .
拉美西斯五世