> If you have enough funding, Malaria is preventable
Malaria is also dependent on a non-human vector. That means you can target it without requiring peoples' co-operation. Contrast that with e.g. polio where you have to convince people to get vaccinated.
I agree, once you detect that malaria is present, you can interrupt the cycle by treating wetlands in the area to kill mosquitos. These efforts are crazy expensive, but then again, so are the health care costs related to treating the disease. In the USA they use a ton of different methods to accomplish this, with and without pesticides. But it's really expensive.
Malaria is also dependent on a non-human vector. That means you can target it without requiring peoples' co-operation. Contrast that with e.g. polio where you have to convince people to get vaccinated.