the coronavirus is raging across america in the final hours of 2021. the u.s. once again shattering its record, now averaging more than 355,000 new cases a day. more than 90,000 people with covid are sick enough to be hospitalized. most since mid-september. and the number of children being admitted to the hospital with covid is at the highest level ever. it comes as the fda is expected to authorize pfizer booster shots for 12-year-olds to 15-year-olds soon. cnn's elizabeth cohen joins us with more. so how soon could we start seeing shots in arms for this age group? >> cnn hears from sources that it could be just days before children ages 12 to 15 are allowed to go out and get booster shots, something people over the age of 16 have been doing for weeks now. when these children go back to school, this is how many children, if this all happens, will be eligible for booster shots.