Sequence of major events in a virus pandemic
 
This article documents the chronology of the response to the COVID-19 pandemic in December 2021, which originated in Wuhan, China in December 2019. Some developments may become known or fully understood only in retrospect. Reporting on this pandemic began in December 2019.
Reactions and measures in South, East and Southeast Asia.
16 December.
The Malaysian Government has reinstated several COVID-19 restrictions including banning mass gatherings and requiring booster doses for high-risk groups in response to the country's second case of the Omicron variant.
References.
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