field has the latest on the spike in covid-19 cases. >> if you look at the uptick, it is actually almost a vertical increase. >> reporter: amid a tsunami of new covid cases, the daily average topping 400,000 for the first time. the fda making major moves to adl add layers of protection, shortening the window between the initial doses of a vaccine and the booster shot for everyone from six months to five, and authorizing a third dose of vaccine for some immunocompromised children between the ages of 5 and 11. all that as the omicron surge brings with it a growing number of hospitalizations. more than 100,000 people are currently hospitalized with covid-19 for the first time in nearly four months. but even that stark figure is lower than we've seen during another surges. >> the one group that that may be a problem for is very young