How much money would I have to donate to against malaria foundation to prevent one child under five years old from being permanently disabled for the rest of their life?

I think it's about 5000 dollars to against malaria foundation to save a life so how much is it to prevent a disability? It must be significantly less right?

Ideally I'd like to be confident I'm preventing an innocent child like under 5 from being disabled who would otherwise have been disabled had I not donated. How much would this cost?