The situation appears to be under control, although cholera is an ongoing problem in Mali.

虽然在马里霍乱是一个持续存在的问题，但是局势看来已得到控制。

This reflects the fact that cholera is, a recurring problem in many areas, and it has become endemic in some 80 countries.

这种情况反映了霍乱在许多地区是个复燃的问题，而在大约80个国家霍乱已变成地方流行性疾病。

John Snow wanted to face the challenge and solve this problem. He knew that cholera would never be controlled until its cause was found.

约翰·斯诺想面对这个挑战并解决这个问题，他知道只有找到霍乱的病因才能控制它。