Eat the slithering, the venomous, the cave bats, end up with pandemic.
Humans have started domesticating Animals thousands and thousands of years ago. Some for a company and some for human food consumption. But there are others we keep at a distance, either because of their dangerous nature or they are not suitable for domestication at all. Any attempt to domesticate a viper or Scorpio will end up in one’s death. So humans through time increased their association with the most beneficial ones, which help them to understand and expand the field of veterinary. They kept their distance from those dangerous or hard to domesticate animals, limiting their knowledge about them. That is where the chians expanded food pyramid brings along with it a dangerous thread of viruses unknown to humans.