Infectious Diseases TopicsShow MoreWhat does climate change have to do with the spread of disease-carrying mosquitoes? Quite a bit according to results of a study in Nature Microbiology. Substances in mosquito saliva trigger immune system responses that can increase the severity of the diseases they transmit, like Zika virus, West Nile, malaria, and dengue fever. We spoke with an epidemiologist with the Centers for Disease Control and Prevention about Lyme disease, other tickborne illnesses, and tick bites. Here’s how to stay safe.