actually, screens did. just ask walter reed.
you are right on #1, but the rest of SM's post was pretty much correct. the upswing in malaria in the congo and other wet parts of africa was tied to the choking out of several species of fish that ate mosquito larvae by some water plants introduced to the region as decorative flourishes for landscaping. they were "set free" during flooding and have been a major problem for the waterways ever since
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