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. 2021 Jan 22;145:106435. doi: 10.1016/j.ypmed.2021.106435

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© 2021 Elsevier Inc. All rights reserved.

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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Fig. 1 — The 7-day change in COVID-19 prevalence across four groups of US counties from February to August 2020.

High Change group (counties in 19 states with the 7-day change in COVID-19 prevalence at the time of SAH order relaxation at 50th percentile and higher), Low Change group (counties in 19 states with the 7-day change in prevalence below 50th percentile), No SAH group (counties in 11 states that did not adopt a SAH order), and No SAH End (counties in 2 states that did not relax the SAH order).

COVID-19: Coronavirus Disease 2019, SAH: Stay-at-Home.