new guidance on masks? the stark difference in protection if you re in a room with someone who has covid, depending on the kind of mask you have on. our chief national correspondent matt gutman leading us off tonight. reporter: tonight, omicron cases exploding, a record 1.4 million in a single day, driven by a backlog of reporting from the weekend. and those numbers pushing hospitals to the brink. > at the current moment, we are completely inundated with covid patients. our in-patient volumes are through the roof. reporter: facing that relentless surge, health officials on capitol hill today defending their pandemic response. this is an extraordinary virus, the likes of which we have not seen even close to in well over 100 years. it is a very wily virus. it has fooled everybody all the time. reporter: the acting fda commissioner warning keeping essential services up and running remains the challenge and says that most people are going to get the virus.
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