Here's some covid science (that actually can explain what is happening and will make every pseud seethe):

• mass vaccination with leaky, short protection vaccine promotes more infectious variants
• large fraction of unvaccinated healthy population reduce the likehood of emergence of highly infectious escape variant
• mass vaccination will make virus more dangerous or young healthy population first, then it will make it even more dangerous for susceptible, high risk groups when they immunity wanes off
• herd immunity is possible only when large portion of population mounted heterogeneous immunity from simply getting sick and recover (or with sterilizing vaccine in non-pandemic scenario - unattainable)
• shortlived, leaky vaccine introduces risk of ADE
• vaccination against outdated, noncirculating variant will make vaccinated suspectible (maybe even more suspectible) in the future when encountering escape variant, recovered indivituals are much more better protected and for longer time
• introducing lare portion of unvaccinated population with strong immunity (healthy) will dampen the pandemic and reduce virus potential - segregating on the basis of vaccination status will prolong the pandemic

https://www.youtube.com/watch?v=qP31cfD3YOY