Comment on

• Medical Masks Versus N95 Respirators for Preventing COVID-19 Among Health Care Workers : A Randomized Trial.

  Loeb M, Bartholomew A, Hashmi M, Tarhuni W, Hassany M, Youngster I, Somayaji R, Larios O, Kim J, Missaghi B, Vayalumkal JV, Mertz D, Chagla Z, Cividino M, Ali K, Mansour S, Castellucci LA, Frenette C, Parkes L, Downing M, Muller M, Glavin V, Newton J, Hookoom R, Leis JA, Kinross J, Smith S, Borhan S, Singh P, Pullenayegum E, Conly J. Loeb M, et al. Ann Intern Med. 2022 Dec;175(12):1629-1638. doi: 10.7326/M22-1966. Epub 2022 Nov 29. Ann Intern Med. 2022. PMID: 36442064 Free PMC article. Clinical Trial.
• Medical Masks Versus N95 Respirators for Preventing COVID-19 Among Health Care Workers.

  Fisman DN, Macintyre R. Fisman DN, et al. Ann Intern Med. 2023 Jul;176(7):eL230073. doi: 10.7326/L23-0073. Ann Intern Med. 2023. PMID: 37459625 No abstract available.
• Medical Masks Versus N95 Respirators for Preventing COVID-19 Among Health Care Workers.

  Hedges K, Levitsky M, Marchand G, Morawska L, Bhérer L, Letellier MC. Hedges K, et al. Ann Intern Med. 2023 Jul;176(7):eL230076. doi: 10.7326/L23-0076. Ann Intern Med. 2023. PMID: 37459626 No abstract available.
• Medical Masks Versus N95 Respirators for Preventing COVID-19 Among Health Care Workers.

  Delaine J. Delaine J. Ann Intern Med. 2023 Jul;176(7):eL230075. doi: 10.7326/L23-0075. Ann Intern Med. 2023. PMID: 37459627 No abstract available.
• Medical Masks Versus N95 Respirators for Preventing COVID-19 Among Health Care Workers.

  Greenhalgh T, Cane DJ, Oliver M. Greenhalgh T, et al. Ann Intern Med. 2023 Jul;176(7):eL230072. doi: 10.7326/L23-0072. Ann Intern Med. 2023. PMID: 37459629 No abstract available.
• Medical Masks Versus N95 Respirators for Preventing COVID-19 Among Health Care Workers.

  Brosseau LM. Brosseau LM. Ann Intern Med. 2023 Jul;176(7):eL230071. doi: 10.7326/L23-0071. Ann Intern Med. 2023. PMID: 37459630 No abstract available.