Malaria is transmitted by Anopheles mosquitoes. Overall, 94 percent of all global cases occur on the African continent. A new study in Science finds that future malaria regions could be smaller than previously assumed, despite climate change. At the same time, global warming increases the regions where the pathogens can be transmitted for at least nine months a year – especially along large rivers. This means that more people could contract malaria, as more people tend to live along these rivers.