> The estimate for COVID-19 is that roughly 70% to 85% of the population will need to be vaccinated to reach the herd immunity threshold.
The vaccines aren't completely effective against transmission, so those numbers were already underestimated for the original virus. With the low efficacy against the omicron (and higher transmission rates), I don't believe any amount of vaccination alone would be enough to stop it (but AFAIK, nobody actually knows it yet).
Still, any amount of vaccination will reduce the transmission rate. What is not clear if it's enough to get it lower than 1.
The vaccines aren't completely effective against transmission, so those numbers were already underestimated for the original virus. With the low efficacy against the omicron (and higher transmission rates), I don't believe any amount of vaccination alone would be enough to stop it (but AFAIK, nobody actually knows it yet).
Still, any amount of vaccination will reduce the transmission rate. What is not clear if it's enough to get it lower than 1.