As Paul Reiter has repeatedly pointed out, notably in From Shakespeare to Defoe: malaria in England in the Little Ice Age, malaria was endemic north of the Arctic Circle, it is not and never was constrained by temperature.
Drop In Malaria Incidence, Despite Climate Change
According to scientific journal PLoS ONE, new research discovered that incidents of malaria cases in the East African highlands have dropped dramatically. 10 years ago, the region experienced a surge in malaria incidents, which researchers associated with climate change. (Medical News Today)
