I actually don’t think the high level of antibodies should be such a surprise. I updated my original comment to clarify, but much of that is from vaccination, not from natural infection. Between high rates of vaccination plus historical infections, it’s not surprising to me that such a high fraction of adults in the UK have antibodies.
I think I agree. I hadn’t realized the UK vaccination rates were so high. In that case I’ll lean towards the pockets of unvaccinated reaching herd immunity + shorter incubation period hypothesis.
I actually don’t think the high level of antibodies should be such a surprise. I updated my original comment to clarify, but much of that is from vaccination, not from natural infection. Between high rates of vaccination plus historical infections, it’s not surprising to me that such a high fraction of adults in the UK have antibodies.
I think I agree. I hadn’t realized the UK vaccination rates were so high. In that case I’ll lean towards the pockets of unvaccinated reaching herd immunity + shorter incubation period hypothesis.