RT @jeremyphoward: The key insight is that most discussions assume that the purpose of the mask is to protect the wearer, since this is what all doctors learn about in medical school. But actually masks work *far* better at blocking the infection at the source. This is called “source control”

RT @joshnesbitt: I’d really appreciate your support in promoting ADH! Live. Let’s see if we can reach even more people now that we’re not bound by a physical location. I’m positive this is something we can do more of in the future to the benefit of a wider community. https://t.co/k7eSCdUbDl