Effect of a Third COVID-19 Booster Among Health Care Workers
Study Details
Study Description
Brief Summary
A new wave of COVID-19 infections, mainly caused by the Omicron/ Delta variant, has been sweeping the globe since the start of 2022. In response, the administration of a third dose of COVID-19 vaccine was considered to address potential waning immunity over time and reduced effectiveness against the Omicron/ Delta variant. The pandemic also resulted in many infections among health care workers (HCWs) and their households. In this study, a retrospective analysis would perform on risk of COVID-19 infection and their outcome in relation to their COVID-19 vaccination history by using the data repository from one of the Hong Kong private hospitals.
HCWs were required to submit a standardized online self-declaration form for report of 1) demographic of the HCWs, 2) symptoms related history and 3) COVID-19 exposure history once they were COVID-19 confirmed by rapid antigen test against COVID-19 and/or polymerase chain reaction (PCR) test for COVID-19. Subsequent follow up such as contact tracing, COVID-19 PCR testing results of these HCWs and status of return to work were captured by the infection control team in a systematic manner.
Condition or Disease | Intervention/Treatment | Phase |
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Study Design
Arms and Interventions
Arm | Intervention/Treatment |
---|---|
Health care workers without third COVID-19 booster Health care workers received less than 3 doses of COVID-19 vaccine |
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HCWs with third COVID-19 booster Health care workers received at least 3 doses of COVID-19 vaccine |
Biological: Third COVID-19 booster
Third COVID-19 booster
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Outcome Measures
Primary Outcome Measures
- COVID-19 Infection [During 1 February - 31 March 2022]
Number of participants with COVID-19 infected
- Number of days return to work after COVID-19 infection [During 1 February - 31 March 2022]
Number of days return to work after COVID-19 infection
Eligibility Criteria
Criteria
Inclusion Criteria:
- All full time staff members of the private hospital
Exclusion Criteria:
- History of COVID-19 before 2022
Contacts and Locations
Locations
Site | City | State | Country | Postal Code | |
---|---|---|---|---|---|
1 | Hong Kong Sanatorium & Hospital | Hong Kong | Hong Kong |
Sponsors and Collaborators
- Hong Kong Sanatorium & Hospital
Investigators
- Principal Investigator: Jonpaul Sze Tsing Zee, MBChB, Hong Kong Sanatorium & Hospital
Study Documents (Full-Text)
None provided.More Information
Publications
None provided.- Third COVID-19 booster