但是，导致疟疾的寄生虫正在发展出青蒿素抗药性，而青蒿素是最有效的疟疾疗法 — — 基于青蒿素的混合疗法的基础。
Still, the parasite that causes malaria is developing resistance to artemisinin, which forms the basis for the most effective treatment: artemisinin-based combination therapies.