eva, thank you. we know this is a welcome new chapter for many of you at home and likely many of you have questions, as well. so, let's bring in dr. ashish jha, dean of the brown university school of public health. dr. jha, as always, thank you for being here. first, you suggested this was coming from the cdc, this updating of their mask guidelines, saying for the most part that fully vaccinated americans can now go outdoors, no masks. do you agree with the move? >> i do, david, and again, thank you for having me back. i think this is a really good move. it tells us we're making progress in this pandemic. getting vaccinated makes a big difference in terms of being safe and i welcome this move by the cdc. >> so, we know if you're fully vaccinated, now you can lose the mask outside, in small gatherings with family and friends. still wear the mask at major events. concerts, sporting events. but i'm curious about all the stuff in the middle, the busy grocery store parking lot, the farmer's market, passing people on the sidewalk. do you wear a mask or is it okay not to? >> i think it's largely okay not to.