他们发现青蒿素和青蒿琥酯是安全的，而且可以迅速清除疟原虫，它们的剂量越高效果越好。
They found that both artemisinin and artesunate were safe and cleared the parasite rapidly, with high doses more effective.
科学家在继续调查青蒿素耐药性具体出现的方式和原因。
Scientists continue to investigate how and why artemisinin resistance specifically emerges.
但是三种抗疟药——青蒿素、青蒿琥酯和蒿甲醚——栓剂的有效性从未进行过比较。
But the three types of antimalarial available in suppository form - artemisinin, artesunate and artemether - have never been compared for effectiveness.
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