I've seen a lot of people talking about the lower risks of outdoor transmission. This rally took place entirely outdoors. https://twitter.com/travisakers/status/1259103329902309376

(Don't let the useful epidemiology get lost in the understandable schadenfreude.)

And just to clarify, obviously outside is lower-risk than inside but I've seen comments around from people who are clearly convinced that it just flat-out doesn't transmit outdoors, or "almost never," and they're overestimating the safety margin provided by fresh air.

If you jam a bunch of yelling people close together, fresh air won't necessarily save you, although you're going to be better off doing that outside than inside.