[deanhills]

May I ask where did you find out the virus came from a wild animal that was kept by a Chinese farmer? My understanding is that a known source of the corona virus was a seafood market which was also a marketplace of wild animals in Wuhan. And the root cause is that Chinese people like to eat wild animals.

If it was just because of China being overpopulated etc, then I would wonder why similar kind of corona virus never originated from India. Because I guess the population density of India is even larger than that of China.  

It was in the news in South Africa but can't recall which source it was.  I've just Googled it and found this report and the further I went through the search results, doesn't seem as though any source is definite yet - this is the closest to what was reported in the news in South Africa:
https://www.livemint.com/news/world/coro...13095.html

This study is looking at bats as a possible source. It discusses the theory that the bat virus came through exposure at seafood hall in Hunan and then dismisses the theory at the same time. It now says "another yet to be identified animal".  
https://www.livescience.com/new-coronavi...-bats.html

Based on these results, the authors said the 2019-nCoV likely originated in bats. However, no bats were sold at the Huanan seafood market, which suggests that another yet-to-be-identified animal acted as a steppingstone of sorts to transmit the virus to humans.

Good question about why a virus hasn't originated in India yet.  I remember though when I was still in the United Arab Emirates that there had been public health studies about the previous SARS virus and one of the points that was raised is overpopulated environment where humans live close to their animals making the transfer of the virus from animal to human being easier to happen.