A United informa:
“The results are in: Your risk of exposure to COVID-19 is almost non-existent on our flights
The Department of Defense, through U.S. Transportation Command (TRANSCOM), just published a landmark study on the safety of commercial air travel that proves the risk of COVID-19 exposure on United aircraft is virtually non-existent.
This study is the most comprehensive on cabin airflow done to date and demonstrates that when a passenger is seated and wearing a mask, on average only 0.003% of infected air particles could enter their breathing zone, even when every seat on the plane is occupied. The study was conducted entirely onboard United aircraft and found that fast onboard air recirculation, downward designed air ventilation and efficient HEPA filters make the cabin of a United airplane one of the safest indoor environments in the world.”