This sounds good
A malaria vaccine has been found to protect children in Africa from serious disease for at least 18 months.It turns out malaria is a devastating disease in much of Africa, with most of the morbidity and mortality concentrated among the young:
Researchers working in Mozambique found the jab cut the risk of clinical malaria by 35% and nearly halved the risk of serious malaria.
Malaria kills over a million people world-wide each year, and one African child every 30 seconds.
so this is potentially a huge step forward.
I always wonder about the relationship between health and economic development in poor countries. I suspect that primarily as countries become richer they get healthier, both because of improved living conditions and more money for health care, rather than vice-versa (spending more on health care leads to greater productivity), but in cases of specific severe diseases like malaria, I don't doubt the relationship goes the other way.