Start here for the deep dive:

• Quan, F., Rubino, I., Lee, S. et al. Universal and reusable virus deactivation system for respiratory protection. Sci Rep7, 39956 (2017). https://doi.org/10.1038/srep39956
• MacIntyre CR, Seale H, Dung TC, et alA cluster randomised trial of cloth masks compared with medical masks in healthcare workersBMJ Open 2015;5:e006577. doi: 10.1136/bmjopen-2014-006577
  • Please, please do not share this on social media. It does not say what you think it says! It is not evidence that cloth masks cause harm.
  • The authors themselves say, “The study design does not allow us to determine whether medical masks had efficacy or whether cloth masks were detrimental to HCWs by causing an increase in infection risk.”
  • This is a study where Vietnamese doctors, who only wore masks about half the time, didn’t even wash masks all the time (92%) and only 4% used hospital laundry (sanitary washing).
  • This study should not be used to generalize to the current COVID-19 situation.

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