Most emerging diseases arise from cross-species transmission of viruses and bacteria, which are then transmitted from animals to humans. Live animal markets foster the spread and evolution of unstable viruses across animal species, leading to emerging disease and pandemics. We must recognize the danger and address transmission of animal pathogens across species, to prevent chronic disease and to prevent future pandemics.

https://www.nytimes.com/2020/06/19/science/coronavirus-rats-vietnam.html