kill you, you should do everything possible to prevent it from infecting you. >> so what do you say to those doctors who suggest this signals at least to them the beginning of the end of a pandemic? are you saying that's too optimistic of a view? >> i've worked with viruses for many decades and i would always say never underestimate a virus, especially a virus such as sars-cov-2 which has shown us an ability to mutate rapidly, mutate extensively, and change the game repeatedly. so every time we have sort of declared victory or freedom or independence and taken off the mask and relaxed our social behaviors, the virus has outsmarted us and come back even stronger. we need to buckle down now. everyone needs to wear an n95 mask when they leave the house. everyone should have that booster shot. we need to kick up our game. we need to use tests, make sure if you're positive, you don't enter a place where there are