Clinical trial of laboratory testing for immune response induced by COVID-19 vaccine

Elucidation of immune response behavior and factors by COVID-19 vaccination - COVID-19 vaccination/ immune response program

Status

Active, not recruiting

Phases

Unknown

Study type

Interventional

Source

JPRN

Registry ID

JPRN-UMIN000043350

Enrollment

Registered

2021-03-08

Start date

2021-03-15

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

Coronavirus disease 2019 (COVID-19)

Interventions

Since the booster effect of the 3rd vaccination was confirmed, the plan was changed to a total of 15 blood samplings, 6 times after the 3rd vaccination. In addition, follow-up will be conducted for 4

Eligibility

Sex/Gender

All

Inclusion criteria

Inclusion criteria: 1. Those who recruited by poster and applied 2. Those who have obtained consent for this research by signing the consent form by the person himself / herself.

Exclusion criteria

Exclusion criteria: 1.Those who cannot tolerate multiple blood draws due to thin blood vessels. 2.Those who have difficulty collecting blood and have strong pain. 3.Those with a history of vasovagal reflex. 4.Those who have already been vaccinated with COVID-19 vaccine.

Design outcomes

Primary

Measure	Time frame
SARS-CoV-2 antibody titers (neutralizing antibody titers and nucleocapsid-antibody, spike-antibody by multiple reagents): humoral immunity	—

Countries

Japan

Contacts

Public ContactKeita Yamashita

Hamamatsu University School of Medicine Department of Laboratory Medicine/Clinical Laboratory

keitay@hama-med.ac.jp053-435-2723

Outcome results

None listed

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