Trial in adults aged 65 years or older to evaluate the immunogenicity of influenza vaccine.

Trial in adults aged 65 years or older to evaluate the immunogenicity of influenza vaccine. - Trial in adults aged 65 years or older to evaluate the immunogenicity of influenza vaccine.

Status

Active, not recruiting

Phases

Unknown

Study type

Interventional

Source

JPRN

Registry ID

JPRN-UMIN000003720

Enrollment

Registered

2010-06-07

Start date

2010-06-01

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

non

Interventions

vaccinate

Eligibility

Sex/Gender

All

Inclusion criteria

Inclusion criteria: 1)written informed consent obtained from the subject. 2)healthy adults aged 65 years or older at time of the first vaccination.

Exclusion criteria

Exclusion criteria: 1)history of previous administration of novel [H1N1]v vaccine. 2)clinically or virologically confirmed influenza infection within 12 months preceding the study start.

Design outcomes

Primary

Measure	Time frame
Seroconversion rate Seroprotection rate Geometric mean fold rise	—

Countries

Japan

Contacts

Public ContactTsutomu Takeda

Clinical support Quality Management division

tsutomu.takeda@clinicalsupport.co.jp092-738-0500

Outcome results

None listed

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