For the world’s viruses, this is a time of unprecedented opportunity. An estimated 40,000 viruses lurk in the bodies of mammals, of which a quarter could conceivably infect humans. Most do not, because they have few chances to leap into our bodies. But those chances are growing.
https://www.theatlantic.com/science/archive/2022/04/how-climate-change-impacts-pandemics/629699/