1. Heimer R, McNeil R, Vlahov D. A community responds to the COVID-19 pandemic: a case study in protecting the health and human rights of people who use drugs. J Urban Health. 2020;97(4):448–56. https://doi.org/10.1007/s11524-020-00465-3.
2. Centers for Disease Control and Prevention (CDC). How COVID-19 spreads. Updated April 13, 2020. Accessed April 18, 2020. https://www.cdc.gov/coronavirus/2019-ncov/prevent-getting-sick/how-covid-spreads.html
3. World Health Organization (WHO). Coronavirus disease 2019 (COVID-2019) situation report - 72 (April 1, 2020). 2020. April 01, 2020.
4. San Francisco Department of Public Health. Shelter in Place - Order Of The Health Officer No. C19-07. (2020).
5. Executive Department, State of California. Stay at Home - Executive-Order-N-33-20. (2020). https://covid19.ca.gov/img/Executive-Order-N-33-20.pdf