Working in Malaria prevention is important primarily, because the disease is comparatively simple to prevent and yet remains a leading cause of death throughout Africa and many other parts of the developing world. Through the proper use of bed nets, covering up exposed skin during evening hours, and removing/covering sources of standing water around your home diminish the mosquito population and therefore your chances of catching malaria.
From personal experience and living in Mozambique for the past 2 years, I can easily say that Malaria is one of the most diagnosed and treated cases at our local Hospital, and that all of my neighbors have been diagnosed or treated for malaria at some point in my service. I also say this while we are in the middle of our rainy season here in Mozambique, and already Malaria cases are beginning to skyrocket as the mosquito population begins to boom.
Peace Corps Volunteer Jason Hillis