In an ideal situation, we'd all be wearing single-use surgical or N95 masks and following the same protocols for use. But we aren't, and the general public shouldn't be using these when there are health workers in desperate need of every piece of PPE they can get. https://twitter.com/NasimZehra/status/1250502278852808705

Here's a great thread on universal mask-wearing: https://twitter.com/zeynep/status/1247159204156043267