In the event of a fire, wear full protective clothing and NIOSH-approved self-contained breathing apparatus with full facepiece operated in the pressure demand or other positive pressure mode.
They advised people to continue taking sensible precautions including ventilating rooms, using face masks, testing regularly and isolating when symptomatic.
Many U.S. states did not require wearing masks whether people were vaccinated or not, but several states that did have mask mandates removed them after the new CDC guidance came out.
His administration's also extended a requirement that travelers on planes, trains and buses wear masks and it's put a ban on travel from eight countries in southern Africa where Omicron was first identified.
Lockdowns, mask requirements and efforts to keep people farther apart have aimed to slow the spread of the disease but it does continue to spread even in areas with strict guidelines in place.