I'm not saying the vaccines aren't effective against the current variants of concern, but the situation with part of the population vaccinated and mass transmis

I'm not saying the vaccines aren't effective against the current variants of concern, but the situation with part of the population vaccinated and mass transmission in the unvaccinated part of the population may favor the emergence of a new vaccine-resistant strain. See also https://www.theguardian.com/world/2021/apr/06/global-rollout-of-vaccines-is-no-longer-a-guarantee-of-victory-over-covid-19 https://www.theguardian.com/world/2021/apr/06/global-rollout...