NCT04706390

Brief Summary

The ongoing Coronavirus Disease 2019 (COVID-19) pandemic has been intensified by no population-based immunity to the severe acute respiratory disease coronavirus 2 (SARS-CoV2) and initially lack of effective treatments or vaccines available to mitigate the pandemic. Currently, two COVID-19 vaccines are available for vaccination in Europe through conditional marketing authorisation granted by the European Medicines Agency and further vaccine will be licensed. These vaccines have shown good vaccine efficacy in phase 3 vaccine trials. We will recruit subjects who will be prioritised for vaccination with the primary aim of comparing the immune responses after COVID-19 vaccination and natural SARS-CoV-2 infection. In Western Norway we have recruited cohorts of health care workers and patients infected with SARS-CoV-2 and will extend to COVID-19 vaccinees. Demographic, clinical data and repeated blood samples will be collected to evaluate the complications and kinetics, duration and breadth of the immune responses comparing natural infection to vaccination.

Trial Health

77
On Track

Trial Health Score

Automated assessment based on enrollment pace, timeline, and geographic reach

Enrollment
2,500

participants targeted

Target at P75+ for all trials

Timeline
56mo left

Started Jan 2021

Longer than P75 for all trials

Geographic Reach
1 country

1 active site

Status
recruiting

Health score is calculated from publicly available data and should be used for screening purposes only.

Trial Relationships

Click on a node to explore related trials.

Study Timeline

Key milestones and dates

Study Progress54%
Jan 2021Dec 2030

First Submitted

Initial submission to the registry

January 11, 2021

Completed
1 day until next milestone

First Posted

Study publicly available on registry

January 12, 2021

Completed
Same day until next milestone

Study Start

First participant enrolled

January 12, 2021

Completed
3.9 years until next milestone

Primary Completion

Last participant's last visit for primary outcome

December 12, 2024

Completed
6 years until next milestone

Study Completion

Last participant's last visit for all outcomes

December 12, 2030

Expected
Last Updated

April 19, 2024

Status Verified

April 1, 2024

Enrollment Period

3.9 years

First QC Date

January 11, 2021

Last Update Submit

April 18, 2024

Conditions

Keywords

Covid19VaccineSARS-CoV-2 antibody

Outcome Measures

Primary Outcomes (1)

  • immune responses

    spike antibody response to SARS-CoV-2

    2 months to 3 years

Secondary Outcomes (2)

  • Duration and breadth of B- cell responses

    2 months to 3 years

  • Duration and breadth of T cell responses

    2 months to 3 years

Study Arms (2)

Health care workers

500-1000 health care workers prioritized for early vaccination

Biological: covid-19 vaccine

prioritized patient populations

2000 individuals in patient populations prioritized for vaccinations

Biological: covid-19 vaccine

Interventions

vaccination

Health care workersprioritized patient populations

Eligibility Criteria

Age20 Years - 100 Years
Sexall
Age GroupsAdult (18-64), Older Adult (65+)
Sampling MethodNon-Probability Sample
Study Population

Comparator group: patients with natural SARS-CoV-2 infection Vaccine groups: Health care workers and high-risk population groups.

You may qualify if:

  • subjects prioritized by national vaccination program

You may not qualify if:

  • Children
  • unable or unwilling to provide informed consent

Contact the study team to confirm eligibility.

Sponsors & Collaborators

Study Sites (1)

University of Bergen

Bergen, 5020, Norway

RECRUITING

Related Publications (4)

  • Cox RJ, Brokstad KA, Krammer F, Langeland N; Bergen COVID-19 Research Group. Seroconversion in household members of COVID-19 outpatients. Lancet Infect Dis. 2021 Feb;21(2):168. doi: 10.1016/S1473-3099(20)30466-7. Epub 2020 Jun 15. No abstract available.

    PMID: 32553187BACKGROUND
  • Trieu MC, Bansal A, Madsen A, Zhou F, Saevik M, Vahokoski J, Brokstad KA, Krammer F, Tondel C, Mohn KGI, Blomberg B, Langeland N, Cox RJ; Bergen COVID-19 Research Group. SARS-CoV-2-Specific Neutralizing Antibody Responses in Norwegian Health Care Workers After the First Wave of COVID-19 Pandemic: A Prospective Cohort Study. J Infect Dis. 2021 Feb 24;223(4):589-599. doi: 10.1093/infdis/jiaa737.

    PMID: 33247924BACKGROUND
  • Bredholt G, Saevik M, Soyland H, Ueland T, Zhou F, Pathirana R, Madsen A, Vahokoski J, Lartey S, Halvorsen BE, Dahl TB, Trieu MC, Mohn KG, Brokstad KA, Aukrust P, Tondel C, Langeland N, Blomberg B, Cox RJ; Bergen COVID-19 Research Group. Three doses of Sars-CoV-2 mRNA vaccine in older adults result in similar antibody responses but reduced cellular cytokine responses relative to younger adults. Vaccine X. 2024 Sep 25;20:100564. doi: 10.1016/j.jvacx.2024.100564. eCollection 2024 Oct.

  • Hansen L, Brokstad KA, Bansal A, Zhou F, Bredholt G, Onyango TB, Sandnes HH, Elyanow R, Madsen A, Trieu MC, Saevik M, Soyland H, Olofsson JS, Vahokoski J, Ertesvag NU, Fjelltveit EB, Shafiani S, Tondel C, Chapman H, Kaplan I, Mohn KGI, Langeland N, Cox RJ. Durable immune responses after BNT162b2 vaccination in home-dwelling old adults. Vaccine X. 2023 Apr;13:100262. doi: 10.1016/j.jvacx.2023.100262. Epub 2023 Jan 10.

Biospecimen

Retention: SAMPLES WITH DNA

Blood collection including cells.

MeSH Terms

Conditions

COVID-19

Interventions

COVID-19 Vaccines

Condition Hierarchy (Ancestors)

Pneumonia, ViralPneumoniaRespiratory Tract InfectionsInfectionsVirus DiseasesCoronavirus InfectionsCoronaviridae InfectionsNidovirales InfectionsRNA Virus InfectionsLung DiseasesRespiratory Tract Diseases

Intervention Hierarchy (Ancestors)

Viral VaccinesVaccinesBiological ProductsComplex Mixtures

Study Officials

  • Rebecca J Cox, PhD

    University of Bergen

    PRINCIPAL INVESTIGATOR

Central Study Contacts

Rebecca J Cox, PhD

CONTACT

Nina Langeland, MD

CONTACT

Study Design

Study Type
observational
Observational Model
COHORT
Time Perspective
PROSPECTIVE
Sponsor Type
OTHER
Responsible Party
PRINCIPAL INVESTIGATOR
PI Title
Professor

Study Record Dates

First Submitted

January 11, 2021

First Posted

January 12, 2021

Study Start

January 12, 2021

Primary Completion

December 12, 2024

Study Completion (Estimated)

December 12, 2030

Last Updated

April 19, 2024

Record last verified: 2024-04

Locations