That could be because the delta variant has taken over in Britain and the vaccines are only about 64% effective against that variant. There is now also delta plus, which is even worse, elsewhere on the planet.
I dread to see what will happen when this variant takes over NY (it is now about 60 plus % of all cases) and sweeps through the typically unvaccinated in the ultra Orthodox and black communities.
I’m not a virologist but I know enough about the subject to wonder if there really IS a “delta variant” — or if the virus they describe is no different than something that should really be considered “COVID-22.”