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 With 96% of flights known to carry covid, and no serious suggestion that the other 4% don't as well, there's no way I'm going anywhere near an aeroplane.

(Unless I was the only person in it. Which won't be happening any time soon as my ratings and medical have expired.)