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Study to Evaluate the Safety and Immune Response of an Investigational Vaccine for the Prevention of RSV (Respiratory Syncytial Virus) and (hMPV) Human Metapneumovirus Infection in Participants Aged 60 to 75 Years

A Phase 1, Randomized, Modified Double-blind, Multi-center, Parallel Group, Multi-arm Study to Investigate the Safety and Immunogenicity of an RSV/hMPV Vaccine Candidate in Adult Participants Aged 60 to 75 Years

Status
Completed
Phases
Phase 1
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT06583031
Enrollment
385
Registered
2024-09-03
Start date
2024-10-09
Completion date
2025-10-09
Last updated
2025-11-20

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

Conditions

hMPV, RSV Infection

Keywords

RSV, RSV Infection, RSV Vaccine, hMPV, hMPV Infection, hMPV Vaccine

Brief summary

VAV00039 is a first-in-human (FiH) study to assess the safety and immunogenicity (in adult participants aged 60-75 years) after a single injection of different dose formulations of an RSV/hMPV vaccine candidate and RSV vaccine.

Detailed description

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

Interventions

BIOLOGICALRSV/hMPV vaccine dose A1

Suspension for injection. Route of administration: IM injection

BIOLOGICALRSV/hMPV vaccine dose A2

Suspension for injection. Route of administration: IM injection

BIOLOGICALRSV/hMPV vaccine dose A3

Suspension for injection. Route of administration: IM injection

BIOLOGICALRSV/hMPV vaccine dose B1

Suspension for injection. Route of administration: IM injection

BIOLOGICALRSV/hMPV vaccine dose B2

Suspension for injection. Route of administration: IM injection

BIOLOGICALRSV/hMPV vaccine dose B3

Suspension for injection. Route of administration: IM injection

BIOLOGICALRSV/hMPV vaccine dose C1

Suspension for injection. Route of administration: IM injection

BIOLOGICALRSV/hMPV vaccine dose C2

Suspension for injection. Route of administration: IM injection

BIOLOGICALRSV/hMPV vaccine dose C3

Suspension for injection. Route of administration: IM injection

BIOLOGICALRSV/hMPV vaccine dose 1

Suspension for injection. Route of administration: IM injection

BIOLOGICALRSV/hMPV vaccine dose 2

Suspension for injection. Route of administration: IM injection

BIOLOGICALRSV/hMPV vaccine dose 3

Suspension for injection. Route of administration: IM injection

BIOLOGICALMonovalent RSV Vaccine

Suspension for injection. Route of administration: IM injection

Sponsors

Sanofi Pasteur, a Sanofi Company
Lead SponsorINDUSTRY

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
PREVENTION
Masking
TRIPLE (Subject, Caregiver, Investigator)

Masking description

Modified double-blinded for the sentinel and main cohorts. * Blinding for vaccine group assignment: participants, outcome assessors, Investigators, laboratory personnel (for both sentinel and main cohort); Sponsor study staff (except biostatistician) and Sponsor SMT (Safety Management Team) for main cohort * No blinding for vaccine group assignment: those preparing and administering the study interventions; Sponsor study staff and Sponsor SMT for sentinel cohorts

Eligibility

Sex/Gender
ALL
Age
60 Years to 75 Years
Healthy volunteers
Yes

Inclusion criteria

* Aged 60 to 75 years on the day of inclusion * A female participant is eligible to participate if she is post-menopausal for at least 1 year, or surgically sterile

Exclusion criteria

* Any condition which, in the opinion of the Investigator, might interfere with the evaluation of the study objectives. * 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 frame
Presence of any unsolicited systemic Adverse Events (AEs) reported within 30 minutes after vaccinationOn Day 1
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 vaccinationDay 1 through day 8
Presence of unsolicited AEs reported through 28 days after vaccinationDay 1 through day 29
Presence of SAEs (Serious Adverse Events) and AESIs (Adverse Events of Special Interest) throughout the study (ie, through 6 months after vaccinationSAE: Screening through day 181; AESI: Day 1 through day 181
Presence of out-of-range biological test results (including shift from baseline values) through 7 days after vaccinationScreening through day 8

Secondary

MeasureTime frame
RSV A and RSV B serum nAb (neutralizing antibodies) titers at pre-vaccination and 28 days post-vaccination in all participantsAt day 1 and day 29
hMPV serum anti-F IgG Ab titers at pre-vaccination, 28 days, 3 months, and 6 months post-vaccination in all participants, except in those receiving the MV RSV vaccineAt day 1, day 29, day 91, and day 181
hMPV A serum nAb titers at pre-vaccination and 28 days post-vaccination in all participants, except in those receiving the MV RSV vaccineAt day 1 and day 28
RSV A and RSV B nAb titers at pre-vaccination, 28 days, 3 months, and 6 months post-vaccination in all participantsAt day 1, day 29, day 91, and day 181
RSV A serum anti-F IgG (immunoglobulin type G) Ab (Antibody) titers at pre-vaccination, 28 days, 3 months, and 6 months post-vaccination in all participantsAt day 1, day 29, day 91, and day 181
hMPV A nAb titers at pre-vaccination, 28 days, 3 months, and 6 months post-vaccination in all participants, except in those receiving the MV RSV vaccineAt day 1, day 29, day 91, and day 181

Countries

Australia

Outcome results

None listed

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