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RSV/hMPV_V low dose vaccine

Phase 1

Respiratory Syncytial Virus Infections+Metapneumovirus | Monoclonal antibody | Respiratory |GSK plc|Last Updated: Aug 20, 2026

Success Probability

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Market & Valuation

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Trial Design

RandomizedDouble-BlindPLACEBO_CONTROLLED
Total Trials1
Total Enrollment1,456

FDA Designations

No designations recorded

Clinical trial landscape

RSV/hMPV_V low dose vaccine · 1 trial · 1 indication

Phase 1 1
NCT07628049A Study of Investigational RSV/hMPV Combination and Investigational hMPV Vaccines in Younger and Older AdultsRespiratory Syncytial Virus Infections+Metapneumovirus
RECRUITING1,456 Analytics
PHASE1RECRUITING
A Study of Investigational RSV/hMPV Combination and Investigational hMPV Vaccines in Younger and Older Adults
Respiratory Syncytial Virus Infections+MetapneumovirusUnlock trial analytics

Study Endpoints

Primary Endpoints

Number of Participants Reporting Solicited Administration Site Events
Day 1 to Day 7

Solicited administration site events include pain, redness (erythema) and swelling at administration site.

Number of Participants Reporting Solicited Systemic Events
Day 1 to Day 7

Solicited systemic events include fever \[defined as oral or axillary temperature greater than or equal to (\>=) 38.0°C/100.4°F\], headache, myalgia (muscle pain), arthralgia (joint pain) and fatigue (tiredness).

Number of Participants Reporting Unsolicited Adverse Events (AEs)
Day 1 to Day 30

An unsolicited AE is defined as an AE that was either not included in the list of solicited events or could be included in the list of solicited events but with an onset outside the specified period of follow up for solicited events. Unsolicited AEs include both serious and non-serious AEs.

Number of Participants Reporting Medically Attended Adverse Events (MAAEs)
Day 1 to Month 12

MAAE is defined as unscheduled visit to or from healthcare professional for any reason, including emergency room visits.

Number of Participants Reporting Potential immune-mediated disorders (pIMDs)
Day 1 to Month 12

pIMDs are a subset of AEs of Special Interest (AESIs) that include autoimmune disorders and other inflammatory and/or neurologic disorders of interest which may or may not have an autoimmune etiology.

Number of Participants Reporting Serious Adverse Events (SAEs)
Day 1 to study end [Month 24 for OA groups (only the selected formulation group & its comparators) and Month 12 for all other YA groups & OA groups]

An SAE is any untoward medical occurrence that results in death, is life-threatening, requires hospitalization or prolongation of existing hospitalization, results in persistent or significant disability/incapacity, is a congenital anomaly/birth defect in the offspring of a study participant, is an abnormal pregnancy outcome, or is a suspected transmission of any infectious agent via an authorized medicinal product.

Number of Participants Reporting Hematological and Biochemical Laboratory Abnormalities
At Day 1 (pre-vaccination) in Phase 1 groups

Secondary Endpoints

Number of participants with hMPV neutralization titers equal to or above (>=) the assay cut-off value
At Day 1 (pre-vaccination), Day 8 and Day 31 in OA groups included in both Phase 1 and Phase 2
Geometric mean titers (GMTs) of hMPV neutralization titers
At Day 1 (pre-vaccination), Day 8 and Day 31 in OA groups included in both Phase 1 and Phase 2
Mean geometric increase (MGI) of hMPV neutralization titers
At Day 8 and Day 31 compared to Day 1 (pre-vaccination) in OA groups included in both Phase 1 and Phase 2
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Study Design & Arms

AllocationRANDOMIZED
MaskingQUADRUPLE
ModelSEQUENTIAL
PurposePREVENTION

Treatment Arms

ArmTypeDescription
RSV/hMPV_X_low dose_Ph1_Younger Adults (YA) GroupEXPERIMENTALYA participants receive a single dose of RSV/hMPV\_X low dose vaccine in Phase 1, at Day 1.
RSV/hMPV_X_medium dose_Ph1_YA GroupEXPERIMENTALYA participants receive a single dose of RSV/hMPV\_X medium dose vaccine in Phase 1, at Day 1.
RSV/hMPV_X_high dose_Ph1_YA GroupEXPERIMENTALYA participants receive a single dose of RSV/hMPV\_X high dose vaccine in Phase 1, at Day 1.
hMPV_Y_high dose_Ph1_YA GroupEXPERIMENTALYA participants receive a single dose of hMPV\_Y high dose vaccine in Phase 1, at Day 1.
hMPV_Z_low dose_Ph1_YA GroupEXPERIMENTALYA participants receive a single dose of hMPV\_Z low dose vaccine in Phase 1, at Day 1.
hMPV_Z_medium dose_Ph1_YA GroupEXPERIMENTALYA participants receive a single dose of hMPV\_Z medium dose vaccine in Phase 1, at Day 1.
hMPV_Z_high dose_Ph1_YA GroupEXPERIMENTALYA participants receive a single dose of hMPV\_Z high dose vaccine in Phase 1, at Day 1.
Control Vaccine_Ph1_YA GroupACTIVE_COMPARATORYA participants receive a single dose of control vaccine in Phase 1, at Day 1.
Placebo_Ph1_YA GroupPLACEBO_COMPARATORYA participants receive a single dose of placebo in Phase 1, at Day 1.
RSV/hMPV_V_low dose_Ph1 and Ph2_Older Adults (OA) GroupEXPERIMENTALOA participants receive a single dose of RSV/hMPV\_V low dose vaccine in both Phase 1 and Phase 2, at Day 1.
RSV/hMPV_V_medium dose_Ph1 and Ph2_OA GroupEXPERIMENTALOA participants receive a single dose of RSV/hMPV\_V medium dose vaccine in both Phase 1 and Phase 2, at Day 1.
RSV/hMPV_V_high dose_Ph1 and Ph2_OA GroupEXPERIMENTALOA participants receive a single dose of RSV/hMPV\_V high dose vaccine in both Phase 1 and Phase 2, at Day 1.
RSV/hMPV_W_low dose_Ph1 and Ph2_OA GroupEXPERIMENTALOA participants receive a single dose of RSV/hMPV\_W low dose vaccine in both Phase 1 and Phase 2, at Day 1.
RSV/hMPV_W_medium dose_Ph1 and Ph2_OA GroupEXPERIMENTALOA participants receive a single dose of RSV/hMPV\_W medium dose vaccine in both Phase 1 and Phase 2, at Day 1.
RSV/hMPV_W_high dose_Ph1 and Ph2_OA GroupEXPERIMENTALOA participants receive a single dose of RSV/hMPV\_W high dose vaccine in both Phase 1 and Phase 2, at Day 1.
RSV/hMPV_X_low dose_Ph1 and Ph2_OA GroupEXPERIMENTALOA participants receive a single dose of RSV/hMPV\_X low dose vaccine in both Phase 1 and Phase 2, at Day 1.
RSV/hMPV_X_medium dose_Ph1 and Ph2_OA GroupEXPERIMENTALOA participants received a single dose of RSV/hMPV\_X medium dose vaccine in both Phase 1 and Phase 2, at Day 1.
RSV/hMPV_X_high dose_Ph1 and Ph2_OA GroupEXPERIMENTALOA participants receive a single dose of RSV/hMPV\_X high dose vaccine in both Phase 1 and Phase 2, at Day 1.
hMPV_Y_low dose_Ph1_OA GroupEXPERIMENTALOA participants receive a single dose of hMPV\_Y low dose vaccine in Phase 1, at Day 1.
hMPV_Y_medium dose_Ph1 and Ph2_OA GroupEXPERIMENTALOA participants receive a single dose of hMPV\_Y medium dose vaccine in both Phase 1 and Phase 2, at Day 1.
hMPV_Y_high dose_Ph1 and Ph2_OA GroupEXPERIMENTALOA participants receive a single dose of hMPV\_Y high dose vaccine in both Phase 1 and Phase 2, at Day 1.
hMPV_Z_low dose_Ph1_OA GroupEXPERIMENTALOA participants receive a single dose of hMPV\_Z low dose vaccine in Phase 1, at Day 1.
hMPV_Z_medium dose_Ph1_OA GroupEXPERIMENTALOA participants receive a single dose of hMPV\_Z medium dose vaccine in Phase 1, at Day 1.
hMPV_Z_high dose_Ph1_OA GroupEXPERIMENTALOA participants receive a single dose of hMPV\_Z high dose vaccine in Phase 1, at Day 1.
Control Vaccine_Ph1 and Ph2_OA GroupACTIVE_COMPARATOROA participants receive a single dose of control vaccine in both Phase 1 and Phase 2, at Day 1.
Placebo_Ph1 and Ph2_OA GroupPLACEBO_COMPARATOROA participants receive a single dose of placebo in both Phase 1 and Phase 2, at Day 1.

Interventions

NameTypeDescription
RSV/hMPV_V low dose vaccineBIOLOGICALRSV/hMPV\_V low dose vaccine administered intramuscularly.
RSV/hMPV_V medium dose vaccineBIOLOGICALRSV/hMPV\_V medium dose vaccine administered intramuscularly.
RSV/hMPV_V high dose vaccineBIOLOGICALRSV/hMPV\_V high dose vaccine administered intramuscularly.
RSV/hMPV_W low dose vaccineBIOLOGICALRSV/hMPV\_W low dose vaccine administered intramuscularly.
RSV/hMPV_W medium dose vaccineBIOLOGICALRSV/hMPV\_W medium dose vaccine administered intramuscularly.
RSV/hMPV_W high dose vaccineBIOLOGICALRSV/hMPV\_W high dose vaccine administered intramuscularly.
RSV/hMPV_X low dose vaccineBIOLOGICALRSV/hMPV\_X low dose vaccine administered intramuscularly.
RSV/hMPV_X medium dose vaccineBIOLOGICALRSV/hMPV\_X medium dose vaccine administered intramuscularly.
RSV/hMPV_X high dose vaccineBIOLOGICALRSV/hMPV\_X high dose vaccine administered intramuscularly.
hMPV_Y low dose vaccineBIOLOGICALhMPV\_Y low dose vaccine administered intramuscularly.
hMPV_Y medium dose vaccineBIOLOGICALhMPV\_Y medium dose vaccine administered intramuscularly.
hMPV_Y high dose vaccineBIOLOGICALhMPV\_Y high dose vaccine administered intramuscularly.
hMPV_Z low dose vaccineBIOLOGICALhMPV\_Z low dose vaccine administered intramuscularly.
hMPV_Z medium dose vaccineBIOLOGICALhMPV\_Z medium dose vaccine administered intramuscularly.
hMPV_Z high dose vaccineBIOLOGICALhMPV\_Z high dose vaccine administered intramuscularly.
Control vaccineBIOLOGICALControl vaccine administered intramuscularly.
PlaceboCOMBINATION_PRODUCTPlacebo administered intramuscularly.
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Eligibility Criteria

Age Range18 Years to 80 Years
SexALL
Healthy VolunteersYes
Study Sites4

Inclusion criteria: Participants are eligible to be included in the study only if all of the following criteria apply: * Written informed consent obtained from the participant prior to performance of any study-specific procedure. * Participants who can and will comply with the requirements of the ...

Countries:United StatesAustralia
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Recent Changes (Last 90 Days)

LOWAug 20, 2026NCT07628049Enrollment: 1808 → 1456
LOWAug 20, 2026NCT07628049Enrollment: 1808 → 1456
LOWJul 8, 2026NCT07628049Status: NOT_YET_RECRUITING → RECRUITING
LOWJul 8, 2026NCT07628049Status: NOT_YET_RECRUITING → RECRUITING

Frequently asked questions about RSV/hMPV_V low dose vaccine

What is RSV low dose formulation vaccine used for?

RSV low dose formulation vaccine is an investigational vaccine being developed for Respiratory Syncytial Virus Infections and for Respiratory Syncytial Virus Infections combined with Metapneumovirus. It is being studied in infants, younger adults, and older adults. The vaccine is currently in Phase 1 clinical development.

Who makes RSV low dose formulation vaccine?

RSV low dose formulation vaccine is being developed by GSK plc, a biopharma company traded on the New York Stock Exchange under the ticker GSK. GSK is conducting clinical trials of this investigational vaccine in multiple countries including the United States, Canada, and Australia.

What phase is RSV low dose formulation vaccine in?

RSV low dose formulation vaccine is in Phase 1 clinical development. It is an investigational vaccine and has not been approved by regulatory authorities. GSK is currently recruiting participants for a Phase 1 trial in younger and older adults, while two earlier Phase 1 trials in infants have been completed.

What clinical trials is RSV low dose formulation vaccine in?

RSV low dose formulation vaccine has been studied in three Phase 1 trials. NCT02927873 and NCT03636906 evaluated the vaccine in infants and are completed. NCT07628049 is an ongoing recruiting trial studying the vaccine in younger and older adults, with an enrollment of 1456 participants.

Is RSV low dose formulation vaccine the same as RSV/hMPV_V low dose vaccine?

Yes, RSV low dose formulation vaccine is also known as RSV/hMPV_V low dose vaccine. The ongoing Phase 1 trial NCT07628049 uses this alternative name to describe the investigational vaccine being studied in combination with a human metapneumovirus vaccine.

How does RSV low dose formulation vaccine work?

RSV low dose formulation vaccine is a monoclonal antibody modality designed to target respiratory syncytial virus and metapneumovirus infections. As a vaccine, it is intended to stimulate an immune response against these respiratory viruses, though the specific molecular target has not been disclosed in available information.