Malaria typically causes a third to half the deaths of children under 5. That's over 3000 per day. When they die, poof, the energy is gone. See papers by Pia Malaney, also on the Harvard site above. Malaria control drops death rates.
Fertility drops with improved economics.
The hope is that births can be lowered at the same time as deaths slow down. Rotarians Against Malaria is a worldwide effort of Rotarians and Rotary Clubs to provide the goods and business know how to malaria efforts. When PolioPlus got started, polio was not eradicable and the program was to provide vaccine wherever needed. Malaria is not now eradicable, but vaccines are on the horizon. The differences between the programs are that RAM and Roll Back Malaria will help to save an estimated 500,000 lives annually en route eventual eradication, lower population growth and improve economies dramatically in the process.