especially at his age, of 79, perhaps the vaccine may not be as effective in this area of omicron at preventing severe pneumonia. so that time to last booster is going to be important to tease out. paxlovid indication, absolutely the right move. we know that early intervention, within that 24 to 48-hour window, yasmin, helps reduce the risk of ending up in the hospital, if he does have vaccine. if he does have any risk of progressions, so he'll further reduce that by starting paxlovid early. and i'm certain his physicians will be looking at overall, how is the president functioning? is he lethargic from his base line? is he fatigued? more fatigued than after a normal day as president? that might prompt them to do -- i'm sure they're going to be frequent vital sign checking, oxygen monitoring.