[cameldrv]

The official line now is that the virus didn't start in the seafood market. The bats that carry the closest viruses to SARS-CoV-2 are located 1000 miles south of Wuhan, and were in hibernation in November. For the theory that the virus was transmitted from a bat to a human in Yunnan to work, it needs to have happened earlier in the year.

[dificilis]

If the virus jumped from bat to some other animal 50 years ago, then the 1000 miles of distance is not hard to explain, and doesn't tell us anything about the time-scale of initial human infection.

We need to find the close relative of Covid19 (TMRCA < 1 year) in a non-human host.