Sample size of many, but correlations doesn't imply causation. Evidence for limited spread on airplanes is pretty solid, but everything from here on out is spe

Sample size of many, but correlations doesn't imply causation. Evidence for limited spread on airplanes is pretty solid, but everything from here on out is speculatory: * A lot of people get sick traveling. You're interacting with all sorts of people from far away who have novel viruses, many of which aren't circulating in your area. That doesn't mean you catch it literally on the airplane. * Masks probably make a bigger difference on airplanes than elsewhere. Even cloth masks catch big particles. By the time droplets evaporate into small droplets, odds are they've passed through a HEPA filter many times.