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A Study on the Safety and Immunogenicity of Influenza, Respiratory Syncytial Virus, Human Metapneumovirus and Parainfluenza Vaccines in Adults 18 to 49 Years of Age.

A Phase 1, Parallel, Randomized, Multi-center Study to Evaluate the Safety and Immunogenicity of Different Formulations of Multivalent Influenza and Respiratory Syncytial Virus (RSV)/Human Metapneumovirus (hMPV)/Parainfluenza Virus Type 3 (PIV3) Vaccines in Healthy Participants 18 to 49 Years of Age.

Status
Completed
Phases
Phase 1
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT06850051
Enrollment
270
Registered
2025-02-27
Start date
2025-03-19
Completion date
2025-12-11
Last updated
2026-01-16

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

Conditions

Healthy Volunteers, Human Metapneumovirus Vaccination, Influenza Vaccination, Parainfluenza Vaccination, Respiratory Syncytial Virus Vaccination

Keywords

influenza, respiratory syncytial virus, parainfluenza, human metapneumovirus

Brief summary

The objective of this study is to evaluate the safety and immunogenicity of different vaccines of hemagglutinin formulations of trivalent influenza vaccine or of a combined respiratory syncytial virus / human metapneumovirus / parainfluenza virus type 3 vaccine in healthy participants 18 to 49 years of age. A lipid nanoparticle will be used in this study. Overall, the study is designed to: * Assess the safety profile of the candidate formulations * Describe the immunogenicity profile of the candidate formulations * Eligible participants will be randomized to receive a single intramuscular injection of either one of the vaccine formulations. Participants will be provided with a diary to solicit reporting of injection site reactions and systemic reactions, unsolicited Adverse Events (AEs), Serious Adverse Events (SAEs) and Adverse Events of Special Interest AESIs). Participants will also be required to record their daily temperature on the diary.

Detailed description

The duration of study participation will be approximately 6 months for each participant.

Interventions

BIOLOGICALTIV-HA Vaccine formulation 1 at low dose

Suspension for injection in a vial. Route of administration: IM injection

BIOLOGICALTIV-HA formulation 1 at high dose

Suspension for injection in a vial. Route of administration: IM injection

BIOLOGICALTIV-HA formulation 2 at low dose

Suspension for injection in a vial. Route of administration: IM injection

BIOLOGICALTIV-HA formulation 2 at high dose

Suspension for injection in a vial. Route of administration: IM injection

BIOLOGICALRSV/hMPV/PIV3 formulation 2 at low dose

Suspension for injection in a vial. Route of administration: IM injection

BIOLOGICALRSV/hMPV/PIV3 formulation 1 at high dose

Suspension for injection in a vial. Route of administration: IM injection

BIOLOGICALRSV/hMPV/PIV3 formulation 2 at high dose

Suspension for injection in a vial. Route of administration: IM injection

BIOLOGICALRSV/hMPV/PIV3 formulation 1 at low dose

Suspension for injection in a vial. Route of administration: IM injection

BIOLOGICALRIV4 (Supemtek®)

Solution for injection in a prefilled syringe. Route of administration: IM injection

Sponsors

Sanofi
Lead SponsorINDUSTRY

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
PREVENTION
Masking
QUADRUPLE (Subject, Caregiver, Investigator, Outcomes Assessor)

Eligibility

Sex/Gender
ALL
Age
18 Years to 49 Years
Healthy volunteers
Yes

Inclusion criteria

* Aged 18 to 49 years on the day of inclusion * A female participant is eligible to participate if she is not pregnant or breastfeeding and one of the following conditions applies: * Is of non-childbearing potential. To be considered of non-childbearing potential, a female must be post-menopausal for at least 1 year, or surgically sterile OR * Is of childbearing potential and agrees to use an effective contraceptive method or abstinence from at least 4 weeks prior to study intervention administration until at least 4 weeks after study intervention administration.

Exclusion criteria

\- Any medical condition or circumstance which, in the opinion of the investigator, might interfere with the evaluation of the study objectives Note: 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
Presence of any unsolicited systemic Adverse Events (AEs) reported within 30 minutes after vaccinationWithin 30 minutes after each vaccinationNumber of participants with unsolicited systemic AEs
Presence of solicited injection site and systemic reactions (ie, pre-listed in the participant's diary and in the eCRF (electronic case report form) occurring through 7 days after vaccinationThrough 7 days after each vaccinationNumber of participants with solicited injection site and systemic reactions
Presence of unsolicited AEs reported through 28 days after vaccinationThrough 28 days after each vaccinationNumber of participants with unsolicited AEs
Presence of SAEs (Serious Adverse Events) and AESIs (Adverse Events of Special Interest) throughout the studyThroughout study, approximately 6 months: Number of participants with SAEs and AESIs
Presence of out-of-range biological test results (including shift from baseline values) through 7 days after vaccinationThrough 7 days after vaccination: Number of participants with out-of-range biological tests
Hemagglutinin Inhibition Assay (HAI) antibody (Ab) response to each homologous influenza strain at Day 1 and Day 29Day 1 and Day 29
RSV A, hMPV A and PIV3 serum neutralizing antibodies (nAb) titers at Day 1 and Day 29Day 1 and Day 29

Secondary

MeasureTime frame
RSV B and hMPV A nAb titers at Day 1 and Day 29Day 1 and Day 29
Neutralization Test (NT) Ab response to each homologous influenza strain at Day 29Day 29

Countries

Australia

Contacts

STUDY_DIRECTORClinical Sciences & Operations

Sanofi

Outcome results

None listed

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