On the other hand, the UK has ~71% vaccinated plus some large percent of acquired immunity, yet infections continue at a high rate. I have no idea why.
Lack of V-D! Vaccination gives 0 protection for an infection and does not contribute to herd immunity at all.
The only no CoV-19 place on earth with high natural infection around 80% is 3/4 of India. The vaccine only control group of Kerala/Mizoram faces the same problems.