虽然取得了一定的成效，但疟疾在很多地方又卷土重来，部分原因就是出现了具有抗药性的疟原虫，比如抵抗传统疟疾治疗药物氯喹的疟原虫。
After limited success, the disease rebounded in many places, due in part to the emergence of parasites that resisted drugs such as chloroquine that had previously held the malady at bay.
令人啼笑皆非的是，这种控制计划的成功要对疟疾的卷土重来负一定的责任。
Ironically the success of the control programs is partly to blame for the resurgence of malaria.
令人啼笑皆非的是，这种控制计划的成功要对疟疾的卷土重来负一定的责任。
Ironically the success of the control programs is partly to blame for the resurge nce of malaria.
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