Rift Valley Fever, which can infect both humans and animals, has long plagued East Africa. And climate change, in combination with urbanization, population growth, and travel, can increase conditions that are favorable for this disease and many others.
Temperature, humidity, and rainfall will be affected by climate change –and each can influence the way that disease develops and spreads. Mosquitoes, for example, thrive in warm, humid climates. As climate change alters the geography of these conditions, the number and range of mosquitoes will also change, spreading the diseases that they carry, and exposing populations that have never before seen them. But this is not just true for mosquitoes – ticks, midges, and other vectors that carry disease also stand to have greater impact with climate change. The impact will be felt—with increasing intensity– by both humans and animals. Of the nearly 340 diseases that have been identified in humans since 1940, ¾ are zoonotic, passing directly from animal species to humans.