CF Burkheimer, Olson, Teno, Danielsson, Guideline, Rio, Nextcast.
May be I should have said, decisive influence. Statistically a number of fully vaccinated people who get infected ( and fully vaccinated person transmits 5-7 time less then unvaccinated) at rate let say 5 per 100 still will be in Canada in 3 weeks for example, in 3 weeks, , 5-6 times smaller than unvaccinated. Add to this much smaller transmission rate and overall conclusion still holds. If one is fully vaccinated and finds himself in a crowded space, by respect to others should put on mask. In US the impact of unvaccinated is and will be much larger for an obvious reason.