During WWII, the U.S military made malaria their top priority for research as more soldiers died from malaria than from bullets. Scientists tested compounds, trying to find an insecticide. They discovered an insecticide cheap enough for any country to afford called DDT. The WHO (World Health Organisation) began an eradication campaign using DDT to help decrease the incidents of malaria worldwide. It removed the disease from Europe, North America and Russia, and also decreased fatalities exponentially in tropical areas as well as in South America, India and Sri Lanka.