The Doctor wasn't jailed ...
The virus was spread at the market. It didn't start at the market.
Until we know where it started we don't know if it would have stopped the virus or not.
Talking about the origin of this virus, this paper of 2015 is quite interesting: https://www.nature.com/articles/nm.3985 . In this paper, the wuhan P4 institute people basically described how they produced a prototype of the 2019 wuhan virus.
Without information about how this letter was prepared and signed among these people in detail, my hypothesis stands.
He is/was also a member of the CCP.
The virus came from bats. The "wildlife market" in question sold raw bat meat. How else would it have gotten there?
They eat lots of animals but bats are not one of them. (I'm sure there is a village in China where they do eat bats. It is a big country.)
The photos you see online of Chinese people eating bats are Tourist in the Pacific.
But this particular part of China does. It's more a subculture derived from one of the minority groups in that province, but it's there.
The original hypothesis was that some other animal sold at the market acted as an intermediate host between bat and human, just like the case in 2003 SARS, but this is also not proven.