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. 2022 Mar 1;53(9):3920–3931. doi: 10.1017/S0033291722000587

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© The Author(s) 2022

This is an Open Access article, distributed under the terms of the Creative Commons Attribution licence (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted re-use, distribution and reproduction, provided the original article is properly cited.

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Fig. 5. — Weekly time-series of COVID-mention and COVID&CMD-mention sessions with reported COVID cases between 1 January 2020, and 28 January 2021. Blue regions demarcate the waves of COVID-19 outbreaks in Hong Kong.