clearly not everyone has to be. As there are about 2.6m people who can’t be.
but every abstaining person is another hit to herd immunity levels.
and “meh, not everyone in the world will get a vaccine” is frankly a pathetic argument. There are plenty of viruses we don’t have ( very much, if at all) in this country due to vaccines that are not eradicated. TB for example, rife in some places yet less than 7k cases
simply put. Everyone not vaccination or immune due to having had it is another person it can mutate in.
yes there is a case to put forward that vaccinated people are getting it but more double jabbed means less transmission which means it’s r0 is lower than 1 which means it goes away.
Every unvaccinated person is a possible increase in r0.