短语讲解：

1. Up until now, many Nigerians took medicine every time they developed a high body temperature, thinking that they might have the disease.

up until now 到现在
例句：How have they shaped your life up until now?
他们到现在为止如何塑造了你的人生？

2. There are an estimated 425 million cases worldwide. The disease kills more than 400,000 people a year.

more than 多于
例句：Margaret needed support more than ever.
玛格丽特比以往更需要关心。

3. A lot of countries have succeeded in eliminating malaria … and the Federal Ministry of Health is doing a lot of work to encourage proper care.”

a lot of 诸多; 许多的
例句：He is a man with a lot of experience under his belt.
他是个阅历很深的人。