1. The evolution of the surgical mask: filtering efficiency versus effectiveness;Belkin;Infect. Control Hosp. Epidemiol.,1997
2. Federal Ministry of Health, Germany, 2020. Daily updates on the coronavirus: is wearing a surgical mask, as protection against acute respiratory infections, useful for members of the general public?. https://www.bundesgesundheitsministerium.de/en/press/2020/coronavirus.html (accessed March 5, 2020).
3. Estimating the generation interval for coronavirus disease (COVID-19) based on symptom onset data, March 2020;Ganyani;Eur. Surveill.,2020
4. Greenhalgh, T., Chan, X., Khunti, K., et al., 2020. What is the efficacy of standard face masks compared to respirator masks in preventing COVID-19 type respiratory illness in primary care staff? Centre for Evidence Based Medicine. 24th March 2020; Ahead of Print.
5. Death and miasma in Victorian London: an obstinate belief;Halliday;BMJ,2001