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Efficacy and Safety of the third dose of mRNA COVID-19 Vaccine in healthy volunteers: An observational study.

Efficacy and Safety of the third dose of mRNA COVID-19 Vaccine in healthy volunteers: An observational study. - mRNA vaccine third dose study in healthy volunteers

Status
Active, not recruiting
Phases
Unknown
Study type
Observational
Source
JPRN
Registry ID
JPRN-UMIN000046211
Enrollment
25
Registered
2021-11-28
Start date
2021-11-28
Completion date
Unknown
Last updated
2026-06-29

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Healthy volunteers

Interventions

None listed

Sponsors

Kobe City Medical Center General Hospital, Department of Hematology
Lead Sponsor

Eligibility

Sex/Gender
All

Inclusion criteria

Inclusion criteria: 1) Healthy adults who do not have any history or comorbidity requiring continuous medication or treatment at the time of study entry, or who have a history of chronic disease but whose condition is stable and who have not required any change in treatment or hospitalization within the past 6 weeks. 2) Willing to receive the SARS-CoV-2 vaccination initiated by the Japanese government or local government. 3) Those who have given written consent to participate in the study.

Exclusion criteria

Exclusion criteria: 1) Those that the principal investigator or sub-investigator deems inappropriate for participation in the study 2) Patients with a history or coexistence of immunosuppressive medication, autoimmune diseases (systemic lupus erythematosus, Sjogren's syndrome, dermatomyositis/polymyositis, mixed connective tissue disease, systemic scleroderma, rheumatoid arthritis, polymyalgia rheumatica, psoriatic arthritis, spondyloarthritis and related diseases, vasculitis syndrome, inflammatory bowel disease, Guillain-Barre syndrome, multiple sclerosis, neuromyelitis optica) Multiple sclerosis, neuromyelitis optica). 3) Patients with a history of COVID-19 4) Patients who are unable to communicate with others

Design outcomes

Primary

MeasureTime frame
The primary endpoint was the rate of positivity of the SARS-CoV-2 IgG antibody.

Secondary

MeasureTime frame
Secondary endpoints will include SARS-CoV-2 IgG antibody titer, peripheral blood lymphocyte fraction, IgG, IgA, IgM, and presence and content of post-vaccination adverse reactions.

Countries

Japan

Contacts

Public ContactMasashi Nishikubo

Kobe City Medical Center General Hospital Department of Hematology

masashi_nishikubo@kcho.jp078-302-4321

Outcome results

None listed

Source: JPRN (via WHO ICTRP) · Data processed: Jul 3, 2026