deltatrials
Completed OBSERVATIONAL NCT04898946

Serological Response to mRNA and Inactivated COVID-19 Vaccine in Health Care Workers in Hong Kong

Sponsor: Hong Kong Sanatorium & Hospital

Conditions Covid-19 Vaccine
Interventions BNT162b2 Vaccine CoronaVac Vaccine
Updated 6 times since 2021 Last updated: Feb 26, 2024 Started: Mar 7, 2021 Primary completion: Dec 31, 2021 Completion: Dec 31, 2021
This information is for research purposes only and is not medical advice. Consult a healthcare provider before making any medical decision.

This observational or N/A phase trial investigates Covid-19 Vaccine and is currently completed. Hong Kong Sanatorium & Hospital leads this study, which shows 6 recorded versions since 2021 — indicating limited longitudinal coverage. Longitudinal tracking of infectious disease trials helps identify durability of treatment effects.

Status Flow

~Jun 2021 – ~Sep 2021 · 3 months · monthly snapshot~Sep 2021 – ~Jun 2023 · 21 months · monthly snapshotRecruiting~Jun 2023 – ~Mar 2024 · 9 months · monthly snapshotUnknown Status~Mar 2024 – ~Jul 2024 · 4 months · monthly snapshot~Jul 2024 – ~Sep 2024 · 2 months · monthly snapshot~Sep 2024 – present · 24 months · monthly snapshotCompleted

Change History

6 versions recorded

  1. Sep 2024 — Present [monthly]

    Completed

  2. Jul 2024 — Sep 2024 [monthly]

    Completed

  3. Mar 2024 — Jul 2024 [monthly]

    Completed

    Status: Unknown Status → Completed

  4. Jun 2023 — Mar 2024 [monthly]

    Unknown Status

    Status: Recruiting → Unknown Status

  5. Sep 2021 — Jun 2023 [monthly]

    Recruiting

▶ Show 1 earlier version

  1. Jun 2021 — Sep 2021 [monthly]

    Recruiting

    First recorded

Mar 2021

Trial started

Per CT.gov start date — pre-dates our first snapshot

Eligibility Summary

No eligibility information available.

Contact Information

Sponsor contact:
  • Hong Kong Sanatorium & Hospital
Data source: Hong Kong Sanatorium & Hospital

For direct contact, visit the study record on ClinicalTrials.gov .

Study Locations