CDC reported this week that there are less than 6000 new infections in fully vaccinated people in US SO FAR.  So far there are 86 millions of Americans fully vaccinated in US. It take at least one week to reach the peak of immunity after second shot, so it is good to still wear mask for a week or longer after second shot. The Infection Rate POST VACCINATION is very low. The vaccines give 90-95% protection.  Jinhai Wang, M.D.