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CompletedNCT04760132ENFORCEUpdated Apr 12, 2024

National Cohort Study of Effectiveness and Safety of SARS-CoV-2/COVID-19 Vaccines (ENFORCE)

A Phase 4 interventional study of COMIRNATY - BioNTech Manufacturing GmbH and COVID-19 Vaccine Moderna dispersion for injection - MODERNA BIOTECH in SARS-CoV Infection, sponsored by Jens D Lundgren, MD. Completed at 5 sites in Denmark. Open to participants aged 18 Years and older, including healthy volunteers. Per ClinicalTrials.gov, last updated 2024-04-12.

Sponsored by Jens D Lundgren, MD · Phase 4, Interventional, and Other

Phase
Phase 4
Study type
Interventional
Enrollment
7,600
Allocation
Non-randomized
Ages
18 Years and older
Sex
All
01

Study summary

National cohort study of effectiveness and safety of SARS-CoV-2 vaccines (ENFORCE is an equivalence trial to evaluate the effectiveness and safety of multiple new SARS-CoV-2 vaccines approved for use in the EU, and which are being offered at participating units.

The design is an open-labelled, non-randomised, parallel group, phase IV study with historical controls.

A sub-study will be embedded within this master protocol addressing basic and translational research questions requiring additional sampling of biological material (under separate participant informed consent).

Read the detailed description

First phase will enrol 10,000 persons initiating vaccination (assuming 4 vaccines). If more vaccines become available additional 2,500 persons per vaccine will be included. Subsequent phases with larger sections of the population included may be implemented.

Participants will have 6 study visits and be followed for 2 years after the first vaccination, which offers the participants an extra close follow up on vaccine effectiveness. Safety data will be collected at study visits until 3 months after the first vaccination. Research samples will be collected at each study visit during the two year follow-up

02

Conditions studied

  • SARS-CoV Infection

Keywords

  • COVID-19
  • Vaccination
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In context

COVID-19

7,640 studies on the registry are indexed under COVID-19; 488 are open to participants now.

This study's enrollment of 7,600 is above the median of 100 across 4,099 interventional studies indexed under COVID-19.

Browse COVID-19 studies →

Lead sponsor

Jens D Lundgren, MD is the lead sponsor of 2 studies on the registry; none are open to participants now.

Counted across the registry records on this site, refreshed daily.

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Who can participate

Ages eligible
18 Years and older
Sexes eligible
All
Accepts healthy volunteers
Yes

Inclusion criteria

  1. Written informed consent obtained before any trial related procedures are performed
  2. Male or female eligible for SARS-CoV-2 immunization (as defined by SST in the national vaccination plan)
  3. The subject must be willing and able to comply with trial protocol (re-visits and biological samples)

Exclusion criteria

Exclusion Criteria:

  1. Male and female under the age of 18
  2. Any subgroup of individuals for which the vaccines are contraindicated
  3. Previous SARS-CoV-2 vaccination
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Study design

Phase
Phase 4
Primary purpose
Other
Allocation
Non-randomized
Intervention model
Parallel assignment
Masking
None (open label)
Enrollment
7,600 participants (actual)

Study arms

  • Active comparator
    Vaccine A - COMIRNATY COVID-19 vaccine

    COMIRNATY (COVID-19, mRNA Vaccine) by BioNTech Manufacturing GmbH Marketing Authorisation EU/1/20/1528

    Biological: COMIRNATY - BioNTech Manufacturing GmbH

  • Active comparator
    Vaccine B - Moderna COVID-19 vaccine

    COVID-19 Vaccine Moderna dispersion for injection (COVID-19, mRNA Vaccine) by MODERNA BIOTECH SPAIN S.L. Marketing Authorisation EU/1/20/1507/001

    Biological: COVID-19 Vaccine Moderna dispersion for injection - MODERNA BIOTECH

  • Active comparator
    Vaccine C - Astra-Zeneca COVID-19 vaccine

    COVID-19 Vaccine AstraZeneca suspension for injection (ChAdOx1-S \[recombinant\]) by AstraZeneca AB Marketing Authorisation EU/1/21/1529/001 and /002

    Biological: COVID-19 Vaccine AstraZeneca suspension for injection

Interventions

  • BiologicalCOMIRNATY - BioNTech Manufacturing GmbH

    Vaccination as part of the the Danish national government programme

  • BiologicalCOVID-19 Vaccine Moderna dispersion for injection - MODERNA BIOTECH

    Vaccination as part of the the Danish national government programme

  • BiologicalCOVID-19 Vaccine AstraZeneca suspension for injection

    Vaccination as part of the the Danish national government programme

06

What researchers measure

Primary outcomes

  1. Assessment of the effectiveness of citizens being vaccinated with one of the SARS-CoV-2 vaccines

    Primary outcome is the minimal protective neutralising antibody titre (MPNAT); i.e. the minimum level of neutralising antibodies sufficient to protect the person from becoming infected.

    Time frame: The change from Base-line in MPNAT measured via profiling of antibodies against SARS-CoV-2 Spike epitopes at 24 month

Secondary outcomes

  1. Number of breakthrough infections in the 24 months period will be used to compare the effectiveness between the vaccines

    Number of confirmed positive SARS-CoV-2 tests reported via the national testing system.

    Time frame: The change from first vaccination until 24 month

  2. Assessment of the safety of the vaccines will be compared between groups

    Reports of participants with local and systemic reactions to the vaccination will be collected

    Time frame: From first vaccine until Day 90

  3. Assessment of any Adverse Event from the vaccines will be compared between groups

    Reports of participants with grade 3 and 4 Adverse Events and any Serious Adverse will be collected

    Time frame: From first vaccine until Day 90

07

Study locations

5 sites
  • Aarhus Universitetshospital, Skejby
    Aarhus, Aarhus N 8200, Denmark
  • Aalborg Universityhospital Syd
    Aalborg, 9000, Denmark
  • Hvidovre Hospital
    Hvidovre, 2600, Denmark
  • Odense Universityhospital
    Odense, 5000, Denmark
  • Sjællandsuniversitetshospital
    Roskilde, 4000, Denmark
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References and documents

Individual participant data

Plan to share: No

No publications or documents are linked to this record.

09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Apr 12, 2024, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
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Registry details

Key details

Study ID
NCT04760132
Lead sponsor
Jens D Lundgren, MD
Collaborators
Ministry of the Interior and Health, Denmark
Responsible party
Jens D Lundgren, MD (Professor, Rigshospitalet, Denmark) — Sponsor-investigator
First posted
Feb 18, 2021
Start date
Feb 8, 2021
Primary completion
Dec 31, 2023
Completion
Dec 31, 2023
Last update
Apr 12, 2024

Study contacts

Jens Lundgren, Professor
study chair · Rigshospitalet, Denmark

Oversight

FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is completed, as verified in Apr 2024. You cannot join it, but the record below documents what was studied.

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