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 I flew from Cape Verde to London and then London to Scotland in the last 24hrs. On both flights I was the only one wearing a mask. Kind of depressing. 😞
@KatieAndThePigs That's been my experience flying, too. I don't get it. My wife always says, "if you're heading to a business conference or a personal vacation, why would you want to risk getting sick on the way there and ruining your trip?" Even if people didn't care about each other, you'd think they'd care about that.