That’s actually not true at all. Bleed air from the engines is constantly pumped into the cabin to maintain pressurization, and what air is recirculated is pumped through HEPA filters. Airplane cabins on a properly maintained modern aircraft have surprisingly clean air.
That’s actually not true at all. Bleed air from the engines is constantly pumped into the cabin to maintain pressurization, and what air is recirculated is pumped through HEPA filters. Airplane cabins on a properly maintained modern aircraft have surprisingly clean air.
https://www.nationalgeographic.com/travel/article/how-clean-is-the-air-on-your-airplane-coronavirus-cvd