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Safety Surveillance of VaxigripTetra® and Efluelda® Influenza Vaccines in Europe During the Influenza Season 2023/24

Enhanced Passive Safety Surveillance of VaxigripTetra® (Quadrivalent Inactivated Split Virion Influenza Vaccine, Intramuscular Route) and Efluelda® (High Dose Quadrivalent Inactivated Split Virion Influenza Vaccine, Intramuscular Route) Vaccines in Europe During the Influenza Season 2023/24

Status
Completed
Phases
Unknown
Study type
Observational
Source
ClinicalTrials.gov
Registry ID
NCT06059456
Enrollment
2078
Registered
2023-09-28
Start date
2023-10-02
Completion date
2023-12-15
Last updated
2025-03-24

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

Conditions

Influenza Immunization (Healthy Volunteers)

Brief summary

This EPSS will determine the vaccinee reporting rates (RRs) of suspected ADRs following routine vaccination with VaxigripTetra® and Efluelda® respectively, during the NH influenza season 2023/24. The primary objective of this surveillance is to estimate the vaccinee reporting rate (RR) of suspected adverse drug reactions (ADRs) occurring within 7 days following routine vaccination with VaxigripTetra® and Efluelda® respectively, during the Northern Hemisphere (NH) influenza season 2023/24. Study duration per participant 2 months (including 6 weeks for VC distribution 2 weeks for vaccinee reporting) following the first vaccination

Interventions

Intramuscular or subcutaneous administration

Intramuscular or subcutaneous administration

Sponsors

Sanofi
Lead SponsorINDUSTRY

Study design

Observational model
OTHER
Time perspective
PROSPECTIVE

Eligibility

Sex/Gender
ALL
Age
6 Months to No maximum
Healthy volunteers
Yes

Inclusion criteria

There are no formal inclusion criteria. Individuals who approach the site for vaccination and agree to receive a vaccination card will be included and vaccinated with the respective vaccine brand according to the country of their location, recommendations for the individual vaccines as well as national recommendations

Exclusion criteria

\-

Design outcomes

Primary

MeasureTime frameDescription
Vaccinee reporting rate of suspected adverse drug reactions (ADRs) following routine vaccination with VaxigripTetra® and Efluelda®Within 7 days after vaccinationNumber of vaccinees who reported at least 1 suspected ADR divided by the total number of vaccination cards (VCs) distributed

Secondary

MeasureTime frameDescription
Vaccinees' reporting rate of serious suspected ADRs at any time following vaccination within the EPSS periodFrom vaccination to end of data collection (maximum 2 months following first vaccination)Serious suspected ADRs will be collected from vaccination up to the end of data collection. Data collection ends when 1000 vaccination cards have been distributed (per vaccine brand) plus 2 weeks or 2 months following the first vaccination, whichever comes first
Vaccinees' reporting rate of ADRs according to age groupWithin 7 days after vaccination
Vaccinees' reporting rate of suspected ADR at any time following vaccination within the EPSS periodFrom vaccination to end of data collection (maximum 2 months following first vaccination)Suspected ADRs will be collected from vaccination up to the end of data collection. Data collection ends when 1000 vaccination cards have been distributed (per vaccine brand) plus 2 weeks or 2 months following the first vaccination, whichever comes first

Countries

Finland, Germany

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026