If you are the kind who says, “You know, I'd mask on flights if WHO or the CDC said I should,” I guess you can now start masking on flights.

WHO urges travellers to wear masks as new #COVID19 variant spreads. #wearamask

https://www.reuters.com/world/whoeurope-backs-travel-checks-us-given-spread-latest-omicron-variant-2023-01-10/

WHO urges travellers to wear masks as new COVID variant spreads

Countries should consider recommending that passengers wear masks on long-haul flights, given the rapid spread of the latest Omicron subvariant of COVID-19 in the United States, World Health Organization (WHO) officials said on Tuesday.

Reuters
@augieray Only on "long" flights. I guess the covid virus on short flights is more forgiving. WHO seems unable to make a proper decision. Too much interference from business and money makers - IMO.
@50sFarmGirl Yeah, I hate the "long" versus "short" flights distinction. It makes no sense since once a plane is in the air, filter is better and risks are reduced. The greatest risk comes during boarding, taxiing, and deplaning, so the risks shouldn't be that different between long and short flights.