Lifting Universal Masking in Schools — Covid-19 Incidence among Students and Staff

• https://www.nejm.org/doi/full/10.1056/NEJMoa2211029
  • Love Them or Hate Them, Masks in Schools Work
  • https://twitter.com/fperrywilson/status/1592302621284614144?s=20&t=oBZCvXHMxkyna2eqU3Gqbg
• Tori L. Cowger et al.

… the lifting of masking requirements was associated with an additional 44.9 cases per 1000 students and staff (95% confidence interval, 32.6 to 57.1) …

Mask wearing for airborne diseases, Difference in differences