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 why say long haul flights? Transportation with people sitting shoulder to shoulder for any length of time is a petrie dish environment. Filtering is nice, not enough. RAT , Ventilation, Filtering, social distance works well. Apparently $o inconvenient. Covid impacts vascular, Neurological, respiratory sys. Long term sequelae can be life altering.
A $ystem cannot fail those it was never meant to protect, and a $ystem will always protect those it was never meant to fail. IMHO