But the distance inside China is the equivilant of a known bat virus in a remote location somewhere in Budapest, where only farmers live, and ground zero of the virus beeing downtown London streetfood market.. (were all the food and everything tested negativ..)
>>martin+(OP)
You don't think bats exchange viruses between Budapest and London? That's nothing. Viruses in interacting populations are routinely continent wide.
Let me flip this around: do you have even one example of a virus within a compatible species spectrum that does not expand across continent scales over the "few year" timeframe we're discussing?