Beer vs. Mosquito
When you brew beer, it generates CO2. That CO2 is heavier than air. If that beer is in a small shed, with a funnel out the top, then the air will be displaced slowly; you end-up with a shed full of CO2 venting out that top funnel. Mosquitoes follow that CO2 down the funnel. They suffocate inside. Feed them to your chickens.
This replaces Mosquitoes in the local pond ecologies with Dragonflies, Beetles, Spiders, etc. And that gets rid of Malaria. How many Millions of folks would benefit from that, at what cost? Multiply by the chance of success, and this sounds like it’s worth TESTING, to optimize for those regions. Just sayin’.
You could probably post a half-dozen beer-sheds encircling a village, and each batch of brew is moved on a dolly to a spot somewhat further from the village-center, such that you steadily enlarge a de-mosquitoed zone.
Also worth considering: though you get a similar CO2 trap with baking soda, that would be a COST of a few dollars a week, only yielding a small amount of chicken-feed and avoiding malaria and bites in general. Instead, brewing beer (or fruit wine into vinegar) generates a revenue from inputs, WHILE eliminating malaria. This is also categorically better than Bed Nets, because those only protect you in BED; the mosquitoes are still flying around everywhere!