> Malaria used to be common in the US until the 1950s or so.
I had no idea of that, as I suspect many given the time past if you wasn't around then. Did a little digging and nicely covered here: https://www.cdc.gov/malaria/about/history/index.html
Which makes me wonder - what the cost of malaria drugs are and how much would it cost to eradicate it. Equally have the true environmental and ecological aspects of eradication methods been analysed. I wasn't aware that mosquito's were pollinators until a while back, not that anything usurps Bee's, but many insects are pollinators and in some area's they may even be crucial as a species.
After all the 1950's approach was basic killing of the mosquito's and whilst that may of been a solution for one area like the US, I'm not sure that approach would be taken as much today and for Africa, certainly as I mentioned, the whole pollinator aspect of mosquito's may make for a more fragile ecosystem that removal of a species would be more impaction than the gains.
I always found it fascinating that malaria has been around so long that a genetic mutation evolved in some that makes them immune to it.