yellow fever

例句：

1. 1. The traveler was diagnosed with yellow fever after returning from the tropical country.
   这位旅行者在从热带国家返回后被诊断出患有黄热病。
2. 2.The yellow fever vaccine is a crucial tool in preventing this deadly disease.
   黄热病疫苗是预防这种致命疾病的关键工具。
3. 3.The yellow fever epidemic has been declared over in the affected area.
   该地区的黄热病疫情已被宣布结束。