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Completed

NCT Number: NCT04780659

COVID-19 Vaccination of Immunodeficient Persons (COVAXID)

The study is designed as an open, non-randomized, phase IV cohort study in which the mRNA vaccine Comirnaty will be given in two doses. Analyses will be performed on blood and saliva, investigating humoral and cellular vaccine responses. Occurence of local or systemic reactogenicity will be evaluated, as well as adverse events. The study will include persons with primary or secondary immunosuppressive disorders, as well as immunocompetent persons, with the aim of investigating if the immune responses after given Comirnaty mRNA vaccine against COVID-19.

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Key information

Age range

18 year and older

Sex eligibility

All sexes

Study type

Interventional

Phase

Phase 4

Primary location

Karolinska University Hospital

Stockholm, Huddinge, 14186, Sweden

About this study

In this study with 450 patients with primary or secondary immunosuppressive disorders (patients with primary immunodeficiency, HIV infected patients, patients with allogenic stem cell transplantation/CAR T cell treated, solid organ transplanted, and patients with chronic lymphatic leukemia) from Karolinska University Hospital, and healthy controls of 90 individuals for comparison, we will investigate the safety and the immune responses after mRNA vaccination with Comirnaty after two doses, under 6 months of time for each participant. The study is In collaboration with research groups at Karolinska Institutet and SciLifeLab, with planned in-depth detailed analyses of antibody responses as well as cellular responses. The study has obtained permission from Swedish Medical Agency and Swedish Ethical Review Authority.

Who can participate

Healthy volunteers accepted: Yes

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • Individuals ≥18 years old

2a. In the opinion of the investigator, individuals with immunosuppressive disease who meet one of the following criteria:

  • Primary immunodeficiency
  • Human immunodeficiency virus (HIV)-infection
  • Allogeneic stem cell transplantation / Chimeric antigen receptor (CAR T cell) therapy
  • Solid organ transplant
  • Chronic lymphatic leukemia

or

2b. In the opinion of the investigator, individuals without immunosuppressive disease or treatment without significant co-morbidity

  • Provision of signed informed consent to participate in the study

Exclusion criteria

  • Previous or ongoing Coronavirus Disease-19 (COVID-19).
  • Coagulation disorders, other conditions associated with prolonged bleeding time or anticoagulant treatments, which according to the investigator contraindicate intramuscular injection. Conditions which can be corrected with measures such as platelet concentrate treatments, coagulation factors or other measures for people responsible for anticoagulants are not exclusion criteria.
  • Planned to receive another vaccine within 14 days before the first dose of the study vaccine, or during the period from the first dose of the study vaccine up to 14 days after the second dose of the study vaccine, and vaccination with another vaccine which in the investigator's opinion cannot be planned outside these time periods
  • Pregnancy or breast feeding.
  • Hypersensitivity to the active substance or to any of the excipients contained in the vaccine
  • Individuals who cannot understand the informed consent.
  • Individuals who for other reasons are considered by investigators as not suitable for inclusion

Treatment and study plan

Comirnaty (COVID-19, mRNA vaccine)

Biological

Comirnaty will be administered two times, one at Day 0 and the second dose at Day 21.

Other names: tozinameran, Pfizer mRNA vaccine

Primary outcomes

  1. Assessment of Seroconversion, Defined as Development of Immunoglobulin G (IgG) Antibodies Against Severe Acute Respiratory Syndrome Coronavirus-2 (SARS-CoV-2) After Vaccination of 2 Doses in Seronegative Individuals.

    Time frame: 2 weeks after second dose of vaccine.

    Proportion (95% confidence interval, CI) seroconverting to positive response to SARS-CoV-2 IgG serology test after two doses of vaccine, measured 2 weeks after second dose of vaccine.

Secondary outcomes

  1. Assessment of Any Adverse Events (AE) of the Given Vaccine.

    Time frame: Duration of 0-14 days after the first vaccine dose.

    Proportion (95% CI) who experience adverse events, with AE/SAE/SUSAR (after dose 1)

  2. Assessment of Any Adverse Events (AE) of the Given Vaccine.

    Time frame: Duration of 0-14 days after the second vaccine dose.

    Proportion (95% CI) who experience adverse events, with AE/SAE/SUSAR (after dose 2)

  3. Frequency Who Experience Local and Systemic Reactions

    Time frame: After the first vaccin dose

    Number and proportion (95% CI) who experience local and systemic reactions (after dose 1)

  4. Frequency Who Experience Local and Systemic Reactions

    Time frame: After the second vaccin dose

    Number and proportion (95% CI) who experience local and systemic reactions (after dose 2)

  5. Frequency of SARS-CoV-2 Infection Documented by PCR Test.

    Time frame: 0 - 6 months

    Proportion (95% CI) diagnosed with a new SARS-CoV-2 infection confirmed by a positive PCR test

Sponsors and collaborators

Lead sponsor

Karolinska University Hospital

Other

Collaborators

  • Karolinska Institutet

Registry information

Official study title

Immunological Responses After Vaccination for COVID-19 With the Messenger Ribonucleic Acid (mRNA) Vaccine Comirnaty in Immunosuppressed and Immunocompetent Individuals. An Open and Non-randomized, Phase IV Multicenter Study

Acronym: COVAXID

Important dates

Study start
2021
Primary completion
2021
Study completion
2024
First posted
Mar 3, 2021
Registry last updated
Dec 4, 2025

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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