COVID-19 vaccine clinics continue to open doors in Waterloo Region A total of 2.64 per cent of area residents have received two doses of vaccine, with the target number being 75 per cent, which is what scientists believe will achieve herd immunity.While the vaccination totals have been lower than it was a week earlier, that number may pick up again as AstraZeneca is now available at some primary care offices in the area after being introduced recently at pharmacies.Waterloo Public Health announced another 66 positive tests for the coronavirus on Thursday, lifting the total number of cases in the area to 12,399.This is the third straight day the area has seen more than 60 new cases and pushes the seven-day rolling average number of new.