Intended for healthcare professionals

Letters Covid-19: Should the public wear face masks?

Covid-19: Each discarded face mask is a potential biohazard

BMJ 2020; 369 doi: (Published 21 May 2020) Cite this as: BMJ 2020;369:m2012
  1. James H Bamber, consultant anaesthetist,
  2. Tracey Christmas, consultant anaesthetist
  1. Department of Anaesthesia, Cambridge University Hospitals, Cambridge CB2 0QQ, UK
  1. jhbamber{at}

Javid and colleagues say that “population benefits are plausible and harms unlikely” if the public are encouraged to wear face masks.1 In one week (17-24 April) both of us, however, came across discarded surgical face masks on public roads on our way to work. On a single day, …

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