i have chronic-medical conditions. if i land in the hospital because i have a breakthrough infection or if i get a breakthrough infection, i am much more likely to land in the hospital because of my other medical issues. and so, i should get a booster dose. i think this is the time for us to shift how we think about risk. everybody is calibrating risk in different ways. we should also be calibrating whether somebody wants to get a booster dose, based on their own medical circumstances and risk tolerance, too. >> sanjay, you have been following infection rates in nursing homes across the country. today, the president announced he is requiring nursing homes to get their staff vaccinated in order to continue to receive medicare and medicaid funding. certainly, seems reasonable if you want to get everybody vaccinated. how much of an impact do you think that would have? >> that -- that's the sort of thing that everyone sort of -- you know, sort of agrees upon when i talk to all these health officials. we -- we remember, you know, back to last spring, vast majority of the tragic impact of this disease was on nursing homes and long-term care facilities. a third of all deaths, at one point. plus, we can show you here, i