>> doctor, there's been something that's lingering in the back of my meenind and i wa your perspective. does it concern you that the biden administration hasn't yet confirmed an fda commissioner? there's been an acting commissioner for some time. has that had any impact on the agency's ability to respond? >> i don't think so, no. i mean, i think the advisory committees and the fda itself has been able to evaluate data in the same sort of timely and rigorous manner as always. i don't think the lack of a commissioner has made a difference, no. >> doctor, we ran through the latest covid indicators at the top of the hour, cases, hospitalizations, deaths, all down significantly over the last few weeks. we're starting to see vaccinations tick back up. dr. anthony fauci as we noted earlier warning this weekend about letting our guard down too quickly. let's listen to the sound bite. >> we have to just be careful that we don't prematurely declare victory in many