NCT06784739

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

Trial Health

77
On Track

Trial Health Score

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

Enrollment
5,500

participants targeted

Target at P75+ for all trials

Timeline
11mo left

Started Apr 2020

Longer than P75 for all trials

Geographic Reach
1 country

2 active sites

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 Progress87%
Apr 2020Apr 2027

Study Start

First participant enrolled

April 15, 2020

Completed
4.8 years until next milestone

First Submitted

Initial submission to the registry

January 16, 2025

Completed
4 days until next milestone

First Posted

Study publicly available on registry

January 20, 2025

Completed
2.2 years until next milestone

Primary Completion

Last participant's last visit for primary outcome

April 1, 2027

Expected
Same day until next milestone

Study Completion

Last participant's last visit for all outcomes

April 1, 2027

Last Updated

January 20, 2025

Status Verified

January 1, 2025

Enrollment Period

7 years

First QC Date

January 16, 2025

Last Update Submit

January 16, 2025

Conditions

COVID 19Respiratory Synctial VirusInfluenza VirusSARS-CoV-2 Virus

Keywords

COVID-19Mucosal immunityPandemicVaccinationSecretory IgA

Outcome Measures

Primary Outcomes (1)

  • Antibody responses following SARS-CoV-2 infection and/or vaccination

    Antigen-specific IgG and IgA responses in serum, saliva and nasal secretions (trajectories over time and correlates to protection against infection)

    2022-2026

Secondary Outcomes (3)

  • Antibody responses following Influenza A/B infection and/or vaccination

    2022-2026

  • Antibody responses following RSV infection

    2020-2026

  • Cellular immune responses following SARS-CoV-2, Influenza A/B and RSV A/B infection and/or vaccination

    2020-2026

Study Arms (2)

The COMMUNITY cohort - healthcare workers

5000 healthcare workers employed at Danderyd Hospital at time of enrollment

Other: Blood samplingOther: Mucosal samplingDiagnostic Test: PCR-test

The COMMUNITY cohort - COVID-19 patients

500 patients admitted to Danderyd Hospital with confirmed SARS-CoV-2 infection

Other: Blood samplingOther: Mucosal samplingDiagnostic Test: PCR-test

Interventions

Blood samplingOTHER

Venous blood sampling

The COMMUNITY cohort - COVID-19 patientsThe COMMUNITY cohort - healthcare workers
Mucosal samplingOTHER

Saliva and nasal secretions

The COMMUNITY cohort - COVID-19 patientsThe COMMUNITY cohort - healthcare workers
PCR-testDIAGNOSTIC_TEST

RT qPCR test to determine infection with SARS-CoV-2, Influenza A/B and/or RSV A/B.

The COMMUNITY cohort - COVID-19 patientsThe COMMUNITY cohort - healthcare workers

Eligibility Criteria

Age18 Years+
Sexall
Healthy VolunteersYes
Age GroupsAdult (18-64), Older Adult (65+)
Sampling MethodNon-Probability Sample
Study Population

Danderyd Hospital employs approximately 4,500 healthcare workers. All HCWs are invited to participate in the study through information disseminated via the hospital intranet, email, and word of mouth.

You may qualify if:

  • 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

Contact the study team to confirm eligibility.

Sponsors & Collaborators

Study Sites (2)

Danderyd hospital

Stockholm, 18288, Sweden

RECRUITING

Karolinska Institutet Danderyd Hospital

Stockholm, 18288, Sweden

RECRUITING

Related Publications (19)

  • Ng H, Havervall S, Rosell A, Aguilera K, Parv K, von Meijenfeldt FA, Lisman T, Mackman N, Thalin C, Phillipson M. Circulating Markers of Neutrophil Extracellular Traps Are of Prognostic Value in Patients With COVID-19. Arterioscler Thromb Vasc Biol. 2021 Feb;41(2):988-994. doi: 10.1161/ATVBAHA.120.315267. Epub 2020 Dec 3.

    PMID: 33267662BACKGROUND

  • Sachetto ATA, Archibald SJ, Hisada Y, Rosell A, Havervall S, van Es N, Nieuwland R, Campbell RA, Middleton EA, Rondina MT, Thalin C, Mackman N. Tissue factor activity of small and large extracellular vesicles in different diseases. Res Pract Thromb Haemost. 2023 Mar;7(3):100124. doi: 10.1016/j.rpth.2023.100124. Epub 2023 Mar 15.

    PMID: 37012986BACKGROUND

  • Monteil V, Eaton B, Postnikova E, Murphy M, Braunsfeld B, Crozier I, Kricek F, Niederhofer J, Schwarzbock A, Breid H, Devignot S, Klingstrom J, Thalin C, Kellner MJ, Christ W, Havervall S, Mereiter S, Knapp S, Sanchez Jimenez A, Bugajska-Schretter A, Dohnal A, Ruf C, Gugenberger R, Hagelkruys A, Montserrat N, Kozieradzki I, Hasan Ali O, Stadlmann J, Holbrook MR, Schmaljohn C, Oostenbrink C, Shoemaker RH, Mirazimi A, Wirnsberger G, Penninger JM. Clinical grade ACE2 as a universal agent to block SARS-CoV-2 variants. EMBO Mol Med. 2022 Aug 8;14(8):e15230. doi: 10.15252/emmm.202115230. Epub 2022 Jul 4.

    PMID: 35781796BACKGROUND

  • Mravinacova S, Jonsson M, Christ W, Klingstrom J, Yousef J, Hellstrom C, Hedhammar M, Havervall S, Thalin C, Pin E, Tegel H, Nilsson P, Manberg A, Hober S. A cell-free high throughput assay for assessment of SARS-CoV-2 neutralizing antibodies. N Biotechnol. 2022 Jan 25;66:46-52. doi: 10.1016/j.nbt.2021.10.002. Epub 2021 Oct 7.

    PMID: 34628049BACKGROUND

  • Havervall S, Jernbom Falk A, Klingstrom J, Ng H, Greilert-Norin N, Gabrielsson L, Salomonsson AC, Isaksson E, Rudberg AS, Hellstrom C, Andersson E, Olofsson J, Skoglund L, Yousef J, Pin E, Christ W, Olausson M, Hedhammar M, Tegel H, Mangsbo S, Phillipson M, Manberg A, Hober S, Nilsson P, Thalin C. SARS-CoV-2 induces a durable and antigen specific humoral immunity after asymptomatic to mild COVID-19 infection. PLoS One. 2022 Jan 12;17(1):e0262169. doi: 10.1371/journal.pone.0262169. eCollection 2022.

    PMID: 35020778RESULT

  • von Meijenfeldt FA, Havervall S, Adelmeijer J, Thalin C, Lisman T. Persistent endotheliopathy in the pathogenesis of long COVID syndrome: Comment from von Meijenfeldt et al. J Thromb Haemost. 2022 Jan;20(1):267-269. doi: 10.1111/jth.15580. Epub 2021 Nov 22. No abstract available.

    PMID: 34731533RESULT

  • Blom K, Bladh O, Havervall S, Marking U, Greilert Norin N, Alm JJ, Klingstrom J, Thalin C. Point prevalence of SARS-CoV-2 infection among healthcare workers in March and June 2023 in Sweden. Lancet Reg Health Eur. 2023 Aug 30;33:100725. doi: 10.1016/j.lanepe.2023.100725. eCollection 2023 Oct. No abstract available.

    PMID: 37680234RESULT

  • von Meijenfeldt FA, Havervall S, Adelmeijer J, Lundstrom A, Magnusson M, Mackman N, Thalin C, Lisman T. Sustained prothrombotic changes in COVID-19 patients 4 months after hospital discharge. Blood Adv. 2021 Feb 9;5(3):756-759. doi: 10.1182/bloodadvances.2020003968. No abstract available.

    PMID: 33560386RESULT

  • Havervall S, Rosell A, Phillipson M, Mangsbo SM, Nilsson P, Hober S, Thalin C. Symptoms and Functional Impairment Assessed 8 Months After Mild COVID-19 Among Health Care Workers. JAMA. 2021 May 18;325(19):2015-2016. doi: 10.1001/jama.2021.5612.

    PMID: 33825846RESULT

  • Blom K, Marking U, Havervall S, Norin NG, Gordon M, Garcia M, Tecleab T, Christ W, Forsell M, Phillipson M, Nilsson P, Mangsbo S, Hober S, Aberg M, Klingstrom J, Thalin C. Immune responses after omicron infection in triple-vaccinated health-care workers with and without previous SARS-CoV-2 infection. Lancet Infect Dis. 2022 Jul;22(7):943-945. doi: 10.1016/S1473-3099(22)00362-0. Epub 2022 Jun 9. No abstract available.

    PMID: 35691303RESULT

  • Havervall S, Marking U, Greilert-Norin N, Gordon M, Ng H, Christ W, Phillipson M, Nilsson P, Hober S, Blom K, Klingstrom J, Mangsbo S, Aberg M, Thalin C. Impact of SARS-CoV-2 infection on vaccine-induced immune responses over time. Clin Transl Immunology. 2022 Apr 18;11(4):e1388. doi: 10.1002/cti2.1388. eCollection 2022.

    PMID: 35444806RESULT

  • von Meijenfeldt FA, Havervall S, Adelmeijer J, Lundstrom A, Magnusson M, Mackman N, Thalin C, Lisman T. COVID-19 is Associated with an Acquired Factor XIII Deficiency. Thromb Haemost. 2021 Dec;121(12):1668-1669. doi: 10.1055/a-1450-8414. Epub 2021 May 5. No abstract available.

    PMID: 33742434RESULT

  • Blom K, Havervall S, Marking U, Norin NG, Bacchus P, Groenheit R, Brave A, Thalin C, Klingstrom J. Infection Rate of SARS-CoV-2 in Asymptomatic Healthcare Workers, Sweden, June 2022. Emerg Infect Dis. 2022 Oct;28(10):2119-2121. doi: 10.3201/eid2810.221093. Epub 2022 Aug 23.

    PMID: 35997692RESULT

  • Bladh O, Aguilera K, Marking U, Kihlgren M, Greilert Norin N, Smed-Sorensen A, Sallberg Chen M, Klingstrom J, Blom K, Russell MW, Havervall S, Thalin C, Aberg M. Comparison of SARS-CoV-2 spike-specific IgA and IgG in nasal secretions, saliva and serum. Front Immunol. 2024 Mar 15;15:1346749. doi: 10.3389/fimmu.2024.1346749. eCollection 2024.

    PMID: 38558811RESULT

  • Bladh O, Marking U, Havervall S, Norin NG, Aguilera K, Hober S, Smed-Sorensen A, Gordon M, Blom K, Aberg M, Klingstrom J, Thalin C. Mucosal immune responses following a fourth SARS-CoV-2 vaccine dose. Lancet Microbe. 2023 Jul;4(7):e488. doi: 10.1016/S2666-5247(23)00102-7. Epub 2023 Apr 20. No abstract available.

    PMID: 37086736RESULT

  • Marking U, Bladh O, Havervall S, Greilert-Norin N, Gordon M, Alm JJ, Blom K, Aberg M, Klingstrom J, Thalin C. Mucosal IgA protects against BQ.1 and BQ.1.1 infection. Lancet Infect Dis. 2023 Aug;23(8):e272-e273. doi: 10.1016/S1473-3099(23)00421-8. Epub 2023 Jul 12. No abstract available.

    PMID: 37453441RESULT

  • Havervall S, Marking U, Svensson J, Greilert-Norin N, Bacchus P, Nilsson P, Hober S, Gordon M, Blom K, Klingstrom J, Aberg M, Smed-Sorensen A, Thalin C. Anti-Spike Mucosal IgA Protection against SARS-CoV-2 Omicron Infection. N Engl J Med. 2022 Oct 6;387(14):1333-1336. doi: 10.1056/NEJMc2209651. Epub 2022 Sep 14. No abstract available.

    PMID: 36103621RESULT

  • Marking U, Bladh O, Aguilera K, Yang Y, Greilert Norin N, Blom K, Hober S, Klingstrom J, Havervall S, Aberg M, Sheward DJ, Thalin C. Humoral immune responses to the monovalent XBB.1.5-adapted BNT162b2 mRNA booster in Sweden. Lancet Infect Dis. 2024 Feb;24(2):e80-e81. doi: 10.1016/S1473-3099(23)00779-X. Epub 2024 Jan 5. No abstract available.

    PMID: 38190833RESULT

  • Bladh O, Greilert-Norin N, Havervall S, Marking U, Aguilera K, Alm JJ, Blom K, Aberg M, Klingstrom J, Thalin C. Mucosal and Serum Antibodies 3 Weeks after Symptomatic BA.2.86 Infection. N Engl J Med. 2023 Oct 26;389(17):1626-1628. doi: 10.1056/NEJMc2310347. No abstract available.

    PMID: 37888924RESULT

Related Links

Biospecimen

Retention: SAMPLES WITHOUT DNA

Serum, PBMC, saliva, nasal secretions

MeSH Terms

Conditions

COVID-19

Interventions

Blood Specimen Collection

Condition Hierarchy (Ancestors)

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

Intervention Hierarchy (Ancestors)

Specimen HandlingClinical Laboratory TechniquesDiagnostic Techniques and ProceduresDiagnosisPuncturesSurgical Procedures, OperativeInvestigative Techniques

Study Officials

  • Charlotte Thålin, MD, PhD

    Department of Clinical Sciences, Karolinska Institutet Danderyd Hospital

    PRINCIPAL INVESTIGATOR

Central Study Contacts

Nina Greilert Norin, RN

CONTACT

+ 46812355000nina.greilert@ki.se

Study Design

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

Study Record Dates

First Submitted

January 16, 2025

First Posted

January 20, 2025

Study Start

April 15, 2020

Primary Completion (Estimated)

April 1, 2027

Study Completion (Estimated)

April 1, 2027

Last Updated

January 20, 2025

Record last verified: 2025-01

Locations

SE(2)