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This article was previously published with an error.

The competing interests statement has been updated to:

Author TSNA is a member of the state expert committee group, a scientific group that helps the state to assimilate available scientific evidence on COVID-19 and provide evidence-based opinions on prevention and control of the COVID-19 pandemic. Author ARK is a member of the state expert committee group, state rapid response team with a role to assess and formulate responses to infectious diseases of public health importance, and state medical board providing evidence-based opinions on patient management to the institutional level medical boards during the pandemic. Author SV is joint secretary to the Government of Kerala in the department of Health and Family Welfare. TSNA was involved in the plan and design of this study, interpretation of the results, drafting, and critical revision of the manuscript. ARK and SV were involved in the interpretation of the results and critical revision of the manuscript.