Im the opposite. No way has it been here longer without us knowing, the contact tracing at the start was excellent and credited with buying us extra time so I doubt they missed it by months.
As for how many have had it, IIRC NYC have done large scale antibody testing and came back with 20-30% so I think that’s a reasonable estimate somewhere like London and maybe central Brum, probably a bit less in the less densely populated areas.
All guesswork though.
First known case according to China, was in November.
Now what's the chances it was around a little earlier in Wuhan, and the Chinese are being a bit economical with the truth. It's quite likely imo.
October 2019 the world military games was held in Wuhan. Representatives from 140 countries were there. Over 9000 participants, that's not including support staff etc.
I'd say it could be a distinct possibility someone may have picked up the virus unknowingly, been asymptomatic, at brought it home far earlier than we all originally thought.
May of course be pie in the sky, but it's possible.
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