Since airlines began putting these measures in place in spring 2020, “there has been little evidence to date of onboard disease transmission,” according to researchers at Harvard T.H. Chan School of Public Health. Their report notes that when the “highly effective” ventilation systems are running from boarding until deplaning, which is our practice at United, the risk of exposure falls below that of activities like grocery shopping and dining out.
And even when the plane is full, on average only 0.003% of infected air particles could enter the breathing zone of seated, masked passengers, according to the DOD study.
Requiring customers to complete a "Ready-to-fly" checklist at check-in
Encouraging customers to download the United app for contactless travel assistance and more
Created an 
Notifying customers when we can if their flight is fairly full and giving them the option to change it
Sending customers an email to remind them about required face coverings, new policies and more
Offering customers the convenience of
Providing
Using state-of-the-art, hospital-grade, high-efficiency (HEPA) filters during the entire flight to circulate air and remove 99.97% of airborne particles
Using Ultraviolet C (UVC) lighting wands to disinfect sensitive components like switches and touchscreen displays in our pilot flight decks
Rolling out 