# Effect of a Third COVID-19 Booster Among Health Care Workers

> **NCT05373459** · — · COMPLETED · sponsor: **Hong Kong Sanatorium & Hospital** · enrollment: 3167 (actual)

## Conditions studied

- COVID-19 Vaccines

## Interventions

- **BIOLOGICAL:** Third COVID-19 booster

## Key facts

- **NCT ID:** NCT05373459
- **Lead sponsor:** Hong Kong Sanatorium & Hospital
- **Sponsor class:** INDUSTRY
- **Phase:** —
- **Study type:** OBSERVATIONAL
- **Status:** COMPLETED
- **Start date:** 2022-05-16
- **Primary completion:** 2022-12-31
- **Final completion:** 2022-12-31
- **Target enrollment:** 3167 (ACTUAL)
- **Last updated:** 2024-02-28


## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT05373459

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT05373459, "Effect of a Third COVID-19 Booster Among Health Care Workers". Retrieved via AI Analytics 2026-06-09 from https://api.ai-analytics.org/clinical/NCT05373459. Licensed CC0.

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