1. Massachusetts Department of Public Health. 15 new presumptive positive cases of covid-19 identified by Massachusetts State Public Health Laboratory. 8 Mar 2020. https://www.mass.gov/news/15-new-presumptive-positive-cases-of-covid-19-identified-by-massachusetts-state-public-health.
2. Baker C. No 591: Declaration of a state of emergency to respond to covid-19. 10 Mar 2020. https://www.mass.gov/executive-orders/no-591-declaration-of-a-state-of-emergency-to-respond-to-covid-19.
3. Commonwealth of Massachusetts. Covid-19 cases, quarantine and monitoring. Mar 2020. https://www.mass.gov/info-details/covid-19-cases-quarantine-and-monitoring.