do that is to reserve vaccinations for the most vulnerable. what do you think -- and they said who -- we can pull that second part up. i do want to have him look at that to make sure that he is responding to the right part. who are already highly vaccinated while flooding our communities with cheap states and evidence if i cassius prescribed in early treatment by personal physicians. is that the right strategy? should we swish to that herd immunity and putting more emphasis on early treatment? >> well, south africa reached very low levels of covid not because of high vaccination rates but because of natural immunity from prior infection. and we can say the same of india when they had their big delta wave this summer. they didn't achieve high vaccination rates. i think people should get vaccinated if they have risk factors and they haven't had the infection in the past. but we have got to switch the strategy from chasing a covid zero strategy where we test