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Post-marketing Surveillance Study for the Safety of Efluelda® Pre-filled Syringe

Post-marketing Surveillance Study for the Safety of Efluelda® Pre-filled Syringe, a High-dose Trivalent Influenza Vaccine Administered to Adults 65 Years or Older in the Republic of Korea

Status
Not yet recruiting
Phases
Unknown
Study type
Observational
Source
ClinicalTrials.gov
Registry ID
NCT07282795
Enrollment
670
Registered
2025-12-15
Start date
2026-10-01
Completion date
2029-03-20
Last updated
2026-03-31

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

Conditions

Healthy Volunteers, Influenza Immunization

Keywords

Flu, Efluelda®

Brief summary

To objective of this study is to investigate the incidence of adverse events (AEs) and adverse drug reactions (ADRs) occurred following administration of Efluelda® in adults aged 65 years or older under routine clinical practice, as per approved indications This is an open-label, multi-center, observational active safety surveillance study, designed to be conducted under standard healthcare setting of the Republic of Korea, in accordance with "Regulation on the Operation of Risk Management Plans". The study duration of each participation will be approximately 28 to 35 days. In the event that Visit 2 is not made, the study duration would be extended to 36 to 42 days.

Interventions

BIOLOGICALEfluelda® Pre-filled syringe

Pharmaceutical Form: Suspension for injection in a pre-filled syringe Route of Administration: Intramuscular administration

Sponsors

Sanofi
Lead SponsorINDUSTRY

Study design

Observational model
CASE_ONLY
Time perspective
PROSPECTIVE

Eligibility

Sex/Gender
ALL
Age
65 Years to No maximum
Healthy volunteers
Yes

Inclusion criteria

* Adults aged 65 years or older on the day of enrollment * The informed consent form has been signed and dated * Receipt of 1 dose of Efluelda® on the day of enrollment according to the approved local product label

Exclusion criteria

* Previous history of enrollment in this study * Participation at the time of study enrollment (or in the 4 weeks preceding the enrollment) or planned participation during the present study period in a clinical study investigating a vaccine, drug, medical device or medical procedure The above information is not intended to contain all considerations relevant to a patient's potential participation in a clinical trial.

Design outcomes

Primary

MeasureTime frameDescription
Occurrence of solicited injected site reactions.Up to 7 days after vaccinationNumber of participants experiencing solicited injection site reactions
Occurrence of solicited systemic reactionsUp to 7 days after vaccinationNumber of participants experiencing solicited systemic reactions
Occurrence of unsolicited Adverse Events (AE)From vaccination to Visit 2 (up to approximately 42 days)Number of participants experiencing AEs
Occurrence of unsolicited Adverse Drug Reactions (ADR)From vaccination to Visit 2 (up to approximately 42 days)Number of participants experiencing ADRs
Occurrence of unexpected Adverse Events (AE)From vaccination to participant's last contact (up to approximately 42 days)Number of participants experiencing unexpected AEs
Occurrence of unexpected Adverse Drug Reactions (ADR)From vaccination to participant's last contact (up to approximately 42 days)Number of participants experiencing unexpected ADRs
Occurrence of Serious Adverse Events (SAE)From vaccination to participant's last contact (up to approximately 42 days)Number of participants experiencing SAEs
Occurrence of unexpected Serious Adverse Drug Reactions (SADR)From vaccination to participant's last contact (up to approximately 42 days)Number of participants experiencing unexpected SADRs
Occurrence of Adverse Event of Special Interest (AESI)From vaccination to participant's last contact (up to approximately 42 days)Number of participants experiencing AESIs

Contacts

CONTACTTrial Transparency email recommended (Toll free for US & Canada)
Contact-US@sanofi.com800-633-1610

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Apr 1, 2026