Daf yomi Taanit discusses a need to fast when there is a magefa at nearby place as it is inevitably coming, so we value foresight. The potential danger of new variant is a combination of higher transmission with escape of immunity from previous vaccines and infections. T cell protection seems to be holding better, protecting from severe disease bit not initial infection.
I have a new hypothesis that vivid with variants is continuously circulating in some communities. Most become protected from severe disease, but time to time get infected again. Most of infections aren’t noticed, but some do incremental unseen damage, like myocarditis.. so, after several times, an unusually large load cause a hard case
This would explain anecdotal observations that natural antibodies stay high: they do because they go down only when they stop encountering virus. Also, I am hearing about families who do tests to fly and turn out positive, then they remember yes some kids were not feeling well… Anyone else heard about such things happening?