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. 2021 May 8;25:104283. doi: 10.1016/j.rinp.2021.104283

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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 — Time evolution of I(t), A(t) under different measures. The top Panel and bottom Panel indicate the fraction of symptomatically infected and asymptomatically infected, respectively. The red solid line shows the normal development of the epidemic, while blue dotted-dashed line, green dashed line and orange dashed line represent development under the measures of isolating communities when t = 0,10,20 respectively. In Panels (a), (d), the network average degree = 4, which represents sparsely populated city; In Panels (b), (e), the network average degree = 6, which represents normal size city; In Panels (c), (f), the network average degree = 8, which represents densely populated city. (For interpretation of the references to colour in this figure legend, the reader is referred to the web version of this article.)