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. 2021 Dec 6:dqab017. doi: 10.1093/imammb/dqab017

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© The Author(s) 2021. Published by Oxford University Press on behalf of the Institute of Mathematics and its Applications. All rights reserved.

This article is published and distributed under the terms of the Oxford University Press, Standard Journals Publication Model (https://academic.oup.com/journals/pages/open_access/funder_policies/chorus/standard_publication_model)

This article is made available via the PMC Open Access Subset for unrestricted re-use and analyses in any form or by any means with acknowledgement of the original source. These permissions are granted for the duration of the COVID-19 pandemic or until permissions are revoked in writing. Upon expiration of these permissions, PMC is granted a perpetual license to make this article available via PMC and Europe PMC, consistent with existing copyright protections.

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Fig. 1. — Lockdown efficiency parameter. For simplicity, in our model, the lockdown efficiency parameter is a door-step function. This function is constant, , within the range and zero outside it.

Inline graphic — Lockdown efficiency parameter. For simplicity, in our model, the lockdown efficiency parameter is a door-step function. This function is constant, , within the range and zero outside it.