Yes, I am quite aware that the use of DDT has been re-started in some nations. To my knowlege, it is still banned in the USA. I do know that this use WILL have sad effects on various aspects of the environment while it is killing some mosquitoes. I am not qualified to comment on better ways to prevent malaria, and have not read much either way.

I used the comparison because, off the top of my head, DDT was another example of something which has some good uses, but many problems.