I apologize for the typo. I meant "...declined WITH DDT..."
Deaths declined even with use of DDT just as competency in the U.S. schools declined even with the use of text books. What evidence have you not shared with us that shows a decline in the effectiveness of DDT and/or an increase in resistence among mosquitos? There are other factors which could possibly act as surrogates for resistent strains of mosquitos, are there not?
Going for more coffee.