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Whilst travel between countries has been very much reduced during the pandemic as a result of countries wanting to reduce infected people entering their countries, the act of flying itself presents low likelihood of infections spreading between passengers. This is partly as a result of the design of the ventilation systems of existing aircraft and partly due to the measures taken by aircraft operators, many of which have been mandated by the authorities.
This section directs people to:
Pall Corporation’s website has a good description ofhow aircraft cabin air systems work特别是19分钟视频,describes the pattern of airflow and how HEPA filters remove contaminants down to very small sizes.
The regulation variously described as 0.28m3/min, 0.25kg/min, 0.55lb/min is for large transport aircraft certified by EASA in Europe or the FAA in America, which are aircraft of greater than 19 seats or greater than 19,000lb maximum take-off weight. Smaller aircraft do not have a mandated ventilation flow and thus likely to have much simpler systems.
There are very few aircraft operating as passenger carrying that are greater than 25 years old, so the vast majority are equipped with HEPA filters. All Airbus aircraft have been equipped with HEPA filters since 1994.
Boeing has developed a self-disinfecting lavatory prototype that uses ultraviolet light to disinfect all surfaces in about three seconds after every use - killing 99.9% of germs.
Anti-microbial surfaces make it hard for microbes, such as viruses, to grow. Boeing is evaluating existing products while collaborating with researchers to develop new solutions
Andrew Bradley