This post originally appeared on the SIAPS blog.
Many countries in Central and South America have made significant progress toward eliminating malaria. Between 2000 and 2012, 13 countries in the Americas saw malaria incidence rates drop by more than 75 percent. Argentina, Belize, Costa Rica, Ecuador, El Salvador, Mexico, and Paraguay have all reached the pre-elimination phase, a designation given by the World Health Organization (WHO) when countries meet certain critical steps in eliminating the disease and preventing its reintroduction.
While this progress is encouraging, efforts to eliminate and control other global threats like polio illustrate that the last cases are often the most difficult to address. In the case of malaria, fewer cases bring new challenges in ensuring the supply and proper management of antimalarial medicines.