A useful study! Full of the sorts of important details and caveats that get lost on social media:
- Results only good for 4 specific mask models, •not• all N95, KN95, etc
- Only studied reducing transmission •from• wearer, not •protecting• wearer
- Clear finding: •any• mask is much better than no mask; much-maligned cloth mask performed ~as well as KN95
- Paul reading between the lines a bit: •fit• is everything! Minimizing leakage >>> mask material
https://mastodon.social/@COVID19_DISEASE/112655220079699265