So all of the breathable air on airliners isn't continually recirculated throughout the whole aircraft then?

You're all missing the point that covid is a conspiracy created by the extinction rebellion against the use of aircraft.

I remember that.

https://jamanetwork.com/journals/jam...article/195131

You're all missing the point that covid is a conspiracy created by the extinction rebellion against the use of aircraft.

Not having flown recently, I'm not sure what anti-virus procedures the airlines have initiated but air circulation on modern aircraft does not, on its' own, accelerate COVID-19 transmission. The more like reasons for transmission are caused by lack of social distancing and poor personal hygiene.

AFAIK, most "popular" airlines have abandoned "middle-seat" restrictions so many passengers will be seated immediately next to a stranger. Enclosed spaces and human proximity are the perfect environment for the spread of COVID-19.

If some passengers are not adopting recommended mask usage protocol then transmission of the virus, if present, is inevitable. From my experience of people's use of masks/face coverings while shopping I deduce that many haven't a clue about proper use, with many putting them on/taking them off multiple times, with unwashed/unsterilised hands and some, I have been told, putting masks (even disposable ones) in a pocket for reuse later.

Do you SERIOUSLY believe that - or are you just 'avin a giraffe?

Surely though Omah, the reason why enclosed spaces are so dangerous is down to the fact that you will breathe in contaminated air. The same air being recirculated around the cabin. In the documentary I referred to, it was suggested that although the recirculated air was filtered, things like viruses were to small to be extracted and were still present in the recirculated air, hence the rapid spread of TB.

Most, but not all, commercial aircraft are equipped with HEPA (High Efficiency Particulate Air) filters. That means that, on HEPA-equipped planes, the airflow “mirrors the laminar airflow of an operating room with no or minimal crossover of air streams,” says Dr. Bjoern Becker of the Lufthansa Group of airlines. “Air is pumped from the ceiling into the cabin at a speed of about a yard per second and sucked out again below the window seats.”

About 40 percent of a cabin’s air gets filtered through this HEPA system; the remaining 60 percent is fresh and piped in from outside the plane. “Cabin air is completely changed every three minutes, on average, while the aircraft is cruising,” says Becker.

Officially, certified HEPA filters “block and capture 99.97 percent of airborne particles over 0.3 micron in size,” says Tony Julian, an air-purifying expert with RGF Environmental Group. The efficiency of these filters, perhaps counterintuitively, increases for even smaller particles. So while the exhaled globs that carry SARS-CoV-2 can be quite small, HEPA filters effectively remove the vast majority from the air.

HEPA’s 99.97 percent filtration effectiveness sounds reassuring, and airline execs count on that. But the biggest problem with those systems, says Bates, is that the “filter only guarantees the quality of the air that has passed through it. If the air that someone breathes in has not gone through that filter, then those numbers don’t matter.” This means everyone onboard should wear a mask