Simplify the following text for a Grade 7 native English-speaking person.
Original: Although DDT has never been banned for use in malaria control and there are several other insecticides suitable for IRS , some advocates have claimed that bans are responsible for tens of millions of deaths in tropical countries where DDT had once been effective in controlling malaria .
Simplified: In some places , DDT may be a useful part of a program to stop malaria . This is why DDT is still allowed to be used for controlling malaria .