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. 2021 Dec 8;50(6):638–644. doi: 10.1016/j.ajic.2021.11.031

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© 2021 The Authors

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 4 — The effect of percentage of newly infected, f_tracked. In the simulation, t_isolated = 6 days, N_start = 0. (A) Daily new cases of symptomatic infections. (B) Fraction of susceptible population. Curve labels indicate percentage quarantined for those being tagged and tracked.