1. Johns Hopkins University, COVID-19 Map - Johns Hopkins Coronavirus Resource Center, Johns Hopkins Coronavirus Resource Center, 2020. https://coronavirus.jhu.edu/map.html. Accessed Jul 30 2020.
2. WHO Water, sanitation, hygiene and waste management for COVID-19: technical brief, 03 March 2020, World Health Organization, 2020.
3. Jahromi R, Mogharab V, Jahromi H, Avazpour A, Synergistic effects of anionic surfactants on coronavirus (SARS-CoV-2) virucidal efficiency of sanitizing fluids to fight COVID-19, bioRxiv, p. 2020.05.29.124107, Jun. 2020, https://doi.org/10.1101/2020.05.29.124107.
4. Ellis R, WHO Changes Stance, Says Public Should Wear Masks, 2020. https://www.webmd.com/lung/news/20200608/who-changes-stance-says-public-should-wear-masks. Accessed 31 Jul 2020.
5. Feng S, Shen C, Xia N, Song W, Fan M, Cowling BJ Rational use of face masks in the COVID-19 pandemic, The Lancet Respiratory Medicine, vol. 8, no. 5. Lancet Publishing Group, pp. 434–436, May 01, 2020. https://doi.org/10.1016/S2213-2600(20)30134-X.