1. CDC: nearly 11,000 exposed to coronavirus on flights. Agency investigated 1,600 cases of people who flew while at risk of spreading the coronavirus, identifying nearly 11,000 people who potentially were exposed to the virus on flights https://www.washingtonpost.com/local/trafficandcommuting/nearly-11000-people-have-been-exposed-to-the-coronavirus-on-flights-the-cdc-says/2020/09/19/d609adbc-ed27-11ea-99a1-71343d03bc29_story.html?utm_source=twitter&utm_campaign=wp_main&utm_medium=social

2. According to story, CDC contends viruses don't spread easily on planes w/air filtration systems, but being in close proximity to people for long periods is a problem. CDC’s guidance for travel is that staying home is safest. Indeed, in-flight transmission has been observed...

3. Yesterday researchers published an example of SARS-CoV-2 spread on planes. In March, a super-spreading event on a 10-hour London to Hanoi flight led to 16 Infections due to what is thought to be airborne transmission on the aircraft...

4. Authors of that study challenged the airline industry's assumptions that blocking the middle seat isn't necessary: both the use of face masks and additional physical distancing on planes can help to reduce transmission....
https://wwwnc.cdc.gov/eid/article/26/11/20-3299_article

5. We @FAScientists have asked United and American to block the middle seat. It won't make the problem of long-range aerosols go away but it will reduce the risk of short-range transmission. @iduncan
https://mailchi.mp/fas.org/airline-covid