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. 2021 Feb 16;96(4):849–855. doi: 10.1016/j.mayocp.2021.02.006

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© 2021 Mayo Foundation for Medical Education and Research. Published by Elsevier Inc.

Since January 2020 Elsevier has created a COVID-19 resource centre with free information in English and Mandarin on the novel coronavirus COVID-19. The COVID-19 resource centre is hosted on Elsevier Connect, the company's public news and information website. Elsevier hereby grants permission to make all its COVID-19-related research that is available on the COVID-19 resource centre - including this research content - immediately available in PubMed Central and other publicly funded repositories, such as the WHO COVID database with rights for unrestricted research re-use and analyses in any form or by any means with acknowledgement of the original source. These permissions are granted for free by Elsevier for as long as the COVID-19 resource centre remains active.

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Simplified early iteration of system-level key driver diagram showing the aim and theory for action for the regional response to coronavirus disease 2019 (COVID-19). Our global and SMART aims are listed on the left. Primary and secondary drivers extend on the middle and right side of the figure, respectively. R_eff, effective reproductive ratio; SARS-CoV-2, severe acute respiratory syndrome coronavirus 2; SMART, specific, measurable, achievable, realistic, timebound; SNF, skilled nursing facility.