In the case of the last virus, the most ideal carrier animal for is a bat or snake, since humans don't consume snakes and bats in several areas of the world, but in some places like China they are consumed, and it is suspected that the new outbreak is also linked to the consumption of an infected bat.
The same is the cause for other virus outbreaks in the past.
To prevent future epidemics, governments must take action on making policies for the sale and purchase of livestoc.