https://www.youtube.com/watch?v=4eshN813NNM

"Why do some people die from COVID-19, and others don’t? It’s a question that has plagued us this entire pandemic.

Thanks to new research at the University of Arizona, we’re closer to getting an answer."

EDIT: Just found from Jan. 24th 2020:

Go to timestamp 1:27 "Coronavirus update: Scientists trace outbreak to Chinese snakes":

https://www.youtube.com/watch?v=Rnivacax4vA