“The value of masks to protect other members of the public is diminished if they are incorrectly worn. As anaesthetists we have seen other health professionals in our hospital wear masks in a variety of ways—below the nose, on the chin—because of the discomfort they cause.​ Why should we expect the public to exhibit greater care in their mask wearing to ensure that the benefits outweigh the risks?”

Bamber J H, Christmas T. Covid-19: Each discarded face mask is a potential biohazard. 2020 May; BMJ 2020;369:m2012. https://www.bmj.com/content/369/bmj.m2012