WTHR just had a piece on that said it's believed this originated with snakes in China. And they seemed to be downplaying the risk of people getting it here, although obviously some have.China in particular also suffers from the idiocy of" old wive's cures" for lack of a better term, some of which involve eating animals that really ought not to be eaten, including pests like bats and carnivores like civets (basically a cat). This particular virus stems from a massive exotic wildlife market.
Protip: if it eats dead things don't eat it. If it eats even relatively fresh meat don't eat it. If it does both things DO NOT EVER CONTEMPLATE EATING IT.