Malaria is a scourge, particularly for inhabitants of poor tropical countries. Forty-one percent of the world's population live in areas where malaria is transmitted, with 350-500 million cases each year.
疟疾是一种折磨，对于生活在贫穷的赤道国家的居民而言更是如此。全世界有41%的人口生活在疟疾的疫区，每年有3.5-5亿人罹患此病。