基于联合国统计数据,在滴滴涕禁令之前,疟疾几乎已经成为小疾病。全球每年五万人死亡。几年后,这再次成为全球祸害。自禁令以来,已有五百万人死亡
(based on UN statistics, is that before the DDT ban, malaria had become almost a minor illness. Fifty thousand deaths a year worldwide. A few years later, it was once again a global scourge. Fifty million people have died since the ban)