Kenneth L. Wrote:
Feb 26, 2013 9:55 AM
You apparently conclude that because malaria deaths declined without DDT that DDT became less effective. You may know this to be true, but you haven't helped us with any evidence. What we do know is that mosquito nets and medical treatment have been used, and probably account for the reduced death toll. By your reasoning we should stop using books in school because competency declined even as they were used.