In airplanes, there are numerous sources for pathogens such as viruses and bacteria - the ventilation helps to keep you from getting sick in most cases.
They lie on armrests, the toilet seat, water faucets and even on cushions and blankets - whoever travels by plane is exposed to a multitude of nasty viruses and bacteria. The fact that one does not get sick, at least in most cases, is, among other things, something that many people often find annoying: the ventilation system of the aircraft.
The air in each aircraft is regularly replaced and cleaned by special filters, this standard is similar to that in a hospital. In an airplane, you will most likely not get sick - as soon as you arrive at the check-in or airport building. "No company could allow guests to get sick during a flight, so the high hygienic standards in the air.
Venting nozzles reduce risk of contamination
The small ventilation nozzles above the seat help to minimize the risk of pathogens. Ventilation serves hygiene, well-being and survival. In the air, infectious diseases are usually not an issue, because the ventilation is so good. However, good ventilation is certainly not a health guarantee: Disease promoters can last up to a week in airplanes and find themselves almost everywhere, especially strongly on the fold-out dining tables, but also in the pocket in your front seat or even the seat belt closures.
Especially disgusting: again and again, flight attendants report that the pillows and blankets are not necessarily fresh when they are handed over to the passengers. Especially not when an airplane flies several routes a day. So it can be that someone has already used the ceiling - and has left the pathogen.