4 ms·

Use a Mask Without Valves

• dumbneurologist 6y ago
  This is an important point, and for some reason I haven't seen it discussed very widely: masks with valves protect you, but they don't fully protect anyone else.
  • jaclaz 6y ago
    And additionally, N95 and similar masks are "wasted" in a non-professional use: https://news.ycombinator.com/item?id=23957506 https://news.ycombinator.com/item?id=23957506