migrans

例句：

1. 1. The patient was diagnosed with malaria after a long trip.
   这名病人在长途旅行后被诊断出患有疟疾。
2. 2. Malaria is a serious disease that can be transmitted by mosquitoes.
   疟疾是一种严重的疾病，可以通过蚊子传播。
3. 3. The government has launched an awareness campaign to prevent malaria in the region.
   政府已经启动了一项宣传活动，旨在该地区预防疟疾。