who were due to get boosted so if it's been six months since you have had your -- your -- your moderna or pfizer vaccine, you should get a booster if you are an adult. if it's been two months since the j&j, you should get a booster. those things will help against delta. we don't know, yet, whether they'll -- they'll work against the omicron. but they definitely will help save lives right now, regardless of what happens with the new strain. >> and, dr. besser, what is your definition of fully vaccinated? i mean, do you still consider someone who has had the two-dose regimen of pfizer or moderna to be fully vaccinated? >> well, i think that we -- we are going to need to consider changing what we think of as -- as fully vaccinated. and, you know, as -- as a pediatrician, being fully vaccinated varies depending on the age that you are. and when you hit different age thresholds, it's time to get another shot. so you were fully vaccinated, and then after six months, maybe getting a booster means, you know, that booster means you are fully vaccinated. that's information that we'll learn more over time. clearly, these vaccines continue