Malaria is the illness which kills the most people in the world; someone dies from it every 30 seconds. It is transmitted by a certain type of mosquito and can be found in poor countries, particularly African Sub-Saharan Africa. But this scourge can be avoided. In Mexico, in the south of the state of Oxaca, the number of malaria cases went from a few thousand 10 years ago to less than 200 in 2007. How ? By populations being educated. This allowed the stagnant waters where mosquitoes reproduce to be controlled better. This is down to the « Centro de Paludismo », a body of the Mexican Ministry of Health.