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Recruiting NCT06784739

NCT06784739 COMMUNITY - the COVID-19 Immunity Study

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Clinical Trial Summary
NCT ID NCT06784739
Status Recruiting
Phase
Sponsor Danderyd Hospital
Condition COVID 19
Study Type OBSERVATIONAL
Enrollment 5,500 participants
Start Date 2020-04-15
Primary Completion 2027-04

Eligibility & Interventions

Sex All sexes
Min Age 18 Years
Max Age N/A
Study Type OBSERVATIONAL
Interventions
Blood samplingMucosal samplingPCR-test

Eligibility Fast-Check

Enter your details for a quick preliminary check. This does not replace medical advice.

What to Expect as a Participant

This is an observational study. You will not receive an experimental treatment; researchers will collect data based on your existing condition or standard treatment.

This trial targets 5,500 participants in total. It began in 2020-04-15 with a primary completion date of 2027-04.

⚠ This information is for research awareness only. Always consult your physician before joining any clinical trial. Participation is voluntary and you may withdraw at any time.

Brief Summary

The principal aim of the COMMUNITY study is to investigate immune responses following SARS-CoV-2 infection and/or vaccination in healthcare workers and hospitalized COVID-19 patients. The study aims to enroll a total of 5,000 healthcare workers and 500 COVID-19 patients. All participants are enrolled at Danderyd Hospital in Stockholm, Sweden. Participants will be followed every four months with blood and mucosal sampling in addition to demographic and clinical data provided by the participants and from national registries. Primary outcome: \- Antibody responses in blood and mucosa following SARS-CoV-2 infection and/or vaccination Secondary outcomes: * Cellular immune responses following SARS-CoV-2 infection and/or vaccination * Antibody responses in blood and mucosa following following Influenza A/B infection and/or vaccination * Antibody responses in blood and mucosa following following RSV A/B infection Blood and mucosal samples are collected every 4 months and at tighter intervals in sub studies. PCR testing is conducted upon symptoms of respiratory infections and with regular intervals regardless of symptomatology in sub studies. Participants provide detailed demographic and clinical data through a smart phone application-based questionnaire. Data on infection and vaccination history is collected from national registries

Eligibility Criteria

Inclusion Criteria: * Health care workers: Employment at Danderyd hospital at time of enrollment * COVID-19 patients: Admitted to Danderyd Hospital with confirmed SARS-CoV-2 infection at time of enrollment Exclusion Criteria: * No exclusion criteria

Contact & Investigator

Central Contact

Nina Greilert Norin, RN

✉ nina.greilert@ki.se

📞 + 46812355000

Principal Investigator

Charlotte Thålin, MD, PhD

PRINCIPAL INVESTIGATOR

Department of Clinical Sciences, Karolinska Institutet Danderyd Hospital

Frequently Asked Questions

Who can join the NCT06784739 clinical trial?

This trial is open to participants of all sexes, aged 18 Years or older, studying COVID 19. Full inclusion and exclusion criteria are listed in the Eligibility Criteria section. Always confirm your eligibility with the research team before applying.

Is NCT06784739 currently recruiting?

Yes, NCT06784739 is actively recruiting participants. Contact the research team at nina.greilert@ki.se for enrollment information.

Where is the NCT06784739 trial being conducted?

This trial is being conducted at Stockholm, Sweden, Stockholm, Sweden.

Who is sponsoring the NCT06784739 clinical trial?

NCT06784739 is sponsored by Danderyd Hospital. The principal investigator is Charlotte Thålin, MD, PhD at Department of Clinical Sciences, Karolinska Institutet Danderyd Hospital. The trial plans to enroll 5,500 participants.

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ClinicalMetric — Independent clinical trial intelligence platform. Not affiliated with NIH, ClinicalTrials.gov, the U.S. FDA, or any pharmaceutical company, hospital, or clinical research organization. Trial data is sourced from ClinicalTrials.gov for informational purposes only and does not constitute medical advice. Do not make any treatment, enrollment, or health decisions based solely on information found here — always consult a qualified healthcare professional. Full Disclaimer  ·  Last Reviewed: July 2026  ·  Data Methodology