This is the largest-scale survey conducted on commercial flights.
According to her findings, if passengers stayed in their seats and wore a mask covering their mouth and nose, only 0.003% of the contaminated airborne particles would enter their breathing area.
The rapid refreshment of the air inside the aircraft, the air circulation from top to bottom and the use of highly efficient air filters contribute to a low risk of contamination.
In addition, as it turns out, the air in the cabin is one of the safest indoors.
Three hundred tests were performed within 38 hours of flight and 45 hours of the aircraft on the ground. About 180 million particles were detected in each test on Boeing 777 and Boeing 767 aircraft, of which 99.99% were filtered within 6 minutes.