In a paper published in Nature Ecology & Evolution, researchers reported that roughly twice as many host jumps were inferred to be from humans to other animals, anthroponotic, rather than the other way around. Anthroponosis is the opposite of zoonoses. The pattern was consistent throughout most viral families considered. They also found even more animal-to-animal host jumps, that did not involve humans.
Source: BEEF, March 28, 2024. Link.
The research findings also show that, on average, viral host jumps are associated with an increase in genetic changes or mutations in viruses . . . reflecting how viruses must adapt to better exploit their new hosts.”