There is no single pill, bednet, or vaccine that can guarantee results.

因此，仅仅依靠药片、蚊帐或疫苗并不能保证有效。

But, thanks in part to a huge increase in the number of people using bednets, that's just half as many people as malaria killed in Africa 15 years ago.

但是，在某种程度上由于使用蚊帐的人数大幅度增加，这个数字只是15年以前非洲死于疟疾人数的一半。

But the best reason for optimism comes from the results we are seeing in some African countries, particularly following better coverage with bednets and use of the newer strategy for home-based management.

不过，令人乐观的最好理由来自我们在一些非洲国家看到的成果，尤其是在提高蚊帐覆盖率和采用新的以家庭为基础的管理策略之后所取得的成果。

But, thanks in part to a huge increase in the number of people using bednets, that’s just half as many people as malaria killed in Africa 15 years ago.

但是， 部分由于使用蚊帐的人数大幅增加，这只是 15 年前在非洲因疟疾死亡的人数的一半。