1. New York State Government. A Guide to Reopening NY and Building Back Better; 2020. May. Available from: https://www.governor.ny.gov/sites/governor.ny.gov/files/atoms/files/NYForwardReopeningGuide.pdf.
2. Office of the Governor—Washington State. Safe Start Washington: Phased Reopening County-By-County; 2020. Available from: https://www.governor.wa.gov/sites/default/files/SafeStartPhasedReopening.pdf.
3. State of California. Blueprint for a Safer Economy; 2020. Available from: https://web.archive.org/web/20210323005801/https://covid19.ca.gov/safer-economy/.
4. State of Illinois. Restore Illinois Mitigation plan; 2021. Available from: https://coronavirus.illinois.gov/s/restore-illinois-mitigation-plan.
5. Explaining the homogeneous diffusion of COVID-19 nonpharmaceutical interventions across heterogeneous countries;A Sebhatu;Proceedings of the National Academy of Sciences of the United States of America,2020