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Clinical Trials in Denmark / NCT07279766
Active, not recruiting Phase 4

Effectiveness of mRNA-1273 Variant-Containing Vaccine Formulation Against Severe Outcomes in Adults Aged 50-64 Years Without Risk Factors for Severe COVID-19

NCT07279766 · tracked via the Priya Life Science Denmark tracker
Phase
Phase 4
Started
2025-12-11
Last updated
2026-03-16

Condition(s) studied

COVID-19

Investigational drug(s) / intervention(s)

mRNA-1273 (Moderna COVID-19 vaccine) →

mRNA-1273 (Moderna COVID-19 vaccine): For this arm, the current variant formulation of Spikevax (mRNA-1273) vaccine will be used.

Study summary

The purpose of this pragmatic randomized trial is to evaluate the vaccine effectiveness of the COVID-19 vaccine, mRNA-1273, in adults aged 50-64 years without known risk factors for severe COVID-19 infection. Participants will be randomized 1:1 to either COVID-19 vaccine or no COVID-19 vaccine.

Eligibility

Sex
ALL
Min age
50 Years
Max age
64 Years
Healthy volunteers
Accepted
Inclusion Criteria: * Age 50-64 years * Informed consent form has been signed and dated Exclusion Criteria: * Medical conditions that increase the risk of severe COVID-19, which will be assessed through self-reporting. These medical conditions include: 1. Asthma 2. Cancer (excluding non-melanoma skin cancer) 3. Cardiomyopathies 4. Cerebrovascular disease 5. Chronic kidney disease 6. Chronic lung disease 7. Cystic Fibrosis 8. Dementia 9. Diabetes 10. Down syndrome 11. Heart failure 12. Human Immunodeficiency Virus 13. Immunosuppressive therapy 14. Ischemic heart disease 15. Liver disease 16. Neurological/neuromuscular disease 17. Psychiatric disease (psychotic, schizophrenic, schizotypal, depressive, and bipolar (affective) disorders). 18. Severe obesity (body mass index \>35 kg/m2) 19. Severe substance abuse 20. Short bowel syndrome 21. Solid organ transplant or hematological transplant * Apart from these, there are no specific exclusion criteria for this study

Primary outcome measure(s)

Trial sites (2)

FacilityCityRegionStatus
Center for Translational Cardiology and Pragmatic Randomized Trials, Department of Cardiology, Copenhagen University Hospital - Herlev and Gentofte Hellerup Denmark
Danske Lægers Vaccinations Service Søborg Denmark

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Official registry record

This page summarises publicly available registry data for informational purposes — not medical advice. Eligibility is determined by each study team; patients should discuss participation with their clinician.

View NCT07279766 on ClinicalTrials.gov ↗ ← All trials in Denmark