The news network Al Jazeera has announced an eight-part documentary exploring the positive work of health care professionals in eliminating diseases such as polio, leprosy, River Blindness and more.

The World Health Organization has just confirmed 10 cases of polio in Syria, and health care workers say that without widespread immunizations efforts, the highly contagious virus could easily spread to more of the war-torn nation’s half million unvaccinated children.