Avaliação crítica de novo artigo do CDC sobre a efetividade do uso de máscaras na prevenção da Covid-19.

Mask studies reach a new scientific low point – Vinay Prasad’s Observations and Thoughts

Estudo original: Effectiveness of Face Mask or Respirator Use in Indoor Public Settings for Prevention of SARS-CoV-2 Infection — California, February–December 2021 – CDC Morbidity and Mortality Weekly Report

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Comentário no Twitter

A new @CDCMMWR study shows that people who reported always wearing masks or respirators in indoor public settings in California were less likely to test positive for #COVID19 compared with those who reported not wearing a face covering. Learn more. https://t.co/T8gaqiPHyI pic.twitter.com/6UJ9cs60NK

— CDC (@CDCgov) February 4, 2022