reporter: a vast majority of the country seen in dark red is struggling with covid surnlgsz and some places 50% or more. the nation broke records four times for its seven-day average of new daily covid-19 cases. the nation broke records at least five times this week for its seven-day average of new daily covid-19 cases, reporting an all-time high of more than 394,000 new daily infections on saturday. that s according to the latest data from johns hopkins university. i m worried about our hospitals. we re going to continue to see millions and millions of cases in the united states and even with a lower vie are you lens apparently for this variant, still, about 2% of folks who contract the virus need to be hospitalized. it s going to be a race. it s going to be a race between waiting for this surge to crest and hoping that we don t run out of hospital capacity. reporter: as the holidays come to a close, airlines canceled more than 2700 flights