COMMUNITY - the COVID-19 Immunity Study

Last updated: January 16, 2025
Sponsor: Danderyd Hospital
Overall Status: Active - Recruiting

Phase

N/A

Condition

Covid-19

Sars-cov-2

Treatment

Blood sampling

PCR-test

Mucosal sampling

Clinical Study ID

NCT06784739
2020-01653
2020-01653
  • Ages > 18
  • All Genders
  • Accepts Healthy Volunteers

Study 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

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 infectionat time of enrollment

Exclusion

Exclusion Criteria:

  • No exclusion criteria

Study Design

Total Participants: 5500
Treatment Group(s): 3
Primary Treatment: Blood sampling
Phase:
Study Start date:
April 15, 2020
Estimated Completion Date:
April 30, 2027

Study Description

The COMMUNITY study is designed to longitudinally follow healthcare workers and recovered COVID-19 patients to assess SARS-CoV-2 immune responses over time. Follow-ups are conducted every four months, including serum, PBMC, and mucosa (saliva and nasal secretions) samples. Sub studies with additional samplings and PCR screenings are conducted with regular intervals to assess vaccine responses and correlates to protection against infection.

Analyses include:

  • Quantification and characterization of antibody responses

  • Evaluation of T and B-cell responses

  • RT-qPCR detection of viral infection

  • Mucosal microbiome evaluation

Clinical and demographic data, including information on hospital workplace, exposure, immunosuppressive treatments or conditions, and results from SARS-CoV-2 Rapid Diagnostic Tests, are collected at each follow-up through a smartphone-based app system. Data on SARS-CoV-2 infections and vaccinations are obtained from national registries. In addition, data from home based PCR-screenings are continuously being monitored for SARS-CoV-2, Influenza and RSV infections.

All samples are stored in Biobank Sweden.

Connect with a study center

  • Danderyd hospital

    Stockholm, 18288
    Sweden

    Active - Recruiting

  • Karolinska Institutet Danderyd Hospital

    Stockholm, 18288
    Sweden

    Active - Recruiting

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