i have chronic medical conditions, if i land in the hospital because i have a break through infection or if i get a break through infection, i'll land in the hospital so i should get a booster dose. this is how we should shift how we think about risk. we should be calibrating whether somebody wants to get a booster dose based on the circumstances. >> sanjay, you have ae been following infections in nursing homes. today the president said he's requiring nursing homes to get vaccinated in order to receive medicare and medicaid funding. seems reasonable if you want to get everybody vaccinated. how much of an impact do you think that will have? >> that's the thing everybody agrees on when i talk to these health officials. we remember back to last spring the vast majority of the bad outcomes is at nursing homes. 1/3 of all deaths.