pfizer said its booster helps with omicron but the two-dose vaccine may not be enough. what's your sense on the booster shot as a whole? should we expect a similar result from moderna? when will we know about that? and is this the proof that every america should be getting the third shot? >> yeah, jonathan, i think it is. and i think it will be changing what is the definition of fully immunized. i think that will happen sooner than later. and i do think moderna's data is days behind. this is lab data, so it's not real world data from pfizer, jonathan. the current vaccines will likely hold, but only, as you mentioned, with that third dose. >> recent studies suggests the new variant is more transmissible but maybe less severe. what do we know about that? is it too early to draw that sort of conclusion? i know that some of the people