It's not right if it's a way to harass the unvaccinated as opposed to reducing a substantial risk of transmission on a flight. Quoting Scientific American <a href="https://www.scientificamerican.com/article/evaluating-covid-risk-on-planes-trains-and-automobiles2/" rel="nofollow">https://www.scientificamerican.com/article/evaluating-covid-...</a><p>'At a casual glance, air travel might seem like the perfect recipe for COVID transmission: it packs dozens of people into a confined space, often for hours at a time. But many planes have excellent high-efficiency particulate air (HEPA) filters that capture more than 99 percent of particles in the air, including microbes as SARS-CoV-2, the coronavirus that causes COVID. When their recirculation systems are operating, most commercial passenger jets bring in outside air in a top-to-bottom direction about 20 to 30 times per hours. This results in a 50–50 mix of outside and recirculated air and reduces the potential for airborne spread of a respiratory virus. Many airlines now require passengers to wear a mask during flights except for mealtimes, and some are blocking off middle seats to allow more distancing between people. Companies have also implemented rigorous cleaning procedures between flights. So how does this translate into overall risk?<p>“An airplane cabin is probably one of the most secure conditions you can be in,” says Sebastian Hoehl of the Institute for Medical Virology at Goethe University Frankfurt in Germany, who has co-authored two papers on COVID-19 transmission on specific flights, which were published in JAMA Network Open and the New England Journal of Medicine, respectfully'