It's because in parts of China people live in very close proximity to animals. People will keep farm animals in their homes. That makes it much easier for the any mutation to jump to humans.
People don't realize how primitive parts of China are.
2 posted on 06/15/2018 11:21:08 AM PDT by Governor Dinwiddie
(MAGA in the mornin', MAGA in the evenin', MAGA at suppertime . . .)