Climate change is projected to change the distribution of schistosomiasis in Africa and Asia , with a possible increase in global land area suitable for transmission . A global increase in land area with temperatures suitable for transmission by the three main species of Schistosoma  is projected under the RCP4.5 scenario for the 2021-2050 and 2071-2100 periods , but regional outcomes are expected to vary. In Africa, shifting temperature regimes associated with climate change are expected to lead to reduced snail populations in areas with already high temperatures and higher populations in areas with currently low winter temperatures . Infection risk with Schistosoma mansoni may increase by up to 20% over most of eastern Africa over the next 20-50 years but decrease by more than 50% in parts of north and east Kenya, southern South Sudan and eastern People's Democratic Republic of Congo  , with a possible overall net contraction . In China, currently endemic areas in Sichuan Province may become unsuitable for snail habitats, but currently non-endemic areas in Sichuan and Hunan/Hubei provinces may see a new emergence . In addition to the projected effects of temperature
IPCC
Climate Change 2022: Impacts, Adaptation and Vulnerability
IPCC Report