Africa has been the hardest hit. Progress has been made in reducing deaths in recent years, but millions is not an exaggeration and children have often been the victims. While most of us have a negative attitude towards DDT because of its impact on the wildlife, it did play an important role in controlling mosquitoes and reducing malaria infections in the past.

https://www.who.int/news-room/facts-in-pictures/detail/malar...

http://www.healthdata.org/research-article/global-malaria-mo...

https://www.scientificamerican.com/article/ddt-use-to-combat...