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RSV F vaccine

Phase 3

Respiratory Syncytial Virus Infections | Small molecule | Respiratory |Novavax, Inc.|Last Updated: May 6, 2025

Success Probability
Approval Probability 71%
TA Base Rate26%
Adjusted LOA41%
ML RiskLOW_RISK
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Market & Valuation
rNPV $3.2B
Market Size $9.4B
Revenue Basis $1.6B
Competitors 6
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Trial Design
RandomizedDouble-BlindPLACEBO_CONTROLLEDDMCBiomarker
Total Trials2
Total Enrollment4,686
FDA Designations
No designations recorded
Clinical Trials (2)
NCT IDTitlePhaseStatusEnrollmentVelocityDesignStartCompletionLast UpdatedSitesCountries
NCT02624947A Study to Determine the Safety and Efficacy of the RSV F Vaccine to Protect Infants Via Maternal ImmunizationPHASE3 COMPLETED 4,636Dec 1, 2015Jul 12, 2019May 6, 202588 United States, Argentina +9
NCT02247726RSV F Vaccine Maternal Immunization Study in Healthy Third-trimester Pregnant Women.PHASE2 COMPLETED 50Sep 1, 2014Jul 1, 2016May 27, 20227 United States
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Study Endpoints
Primary Endpoints
Infants: Percentages of Participants With Medically Significant RSV LRTI With Either Hypoxemia (SpO2 <95% at Sea Level or <92% at Altitudes >1800 Meters) or Tachypnea
Delivery to 180 days after delivery

Percentages of infants with medically-significant RSV LRTI from delivery through 90, 120,150, and 180 days of life, as defined by: * The presence of RSV infection confirmed by detection of RSV genome by RT-PCR on respiratory secretions (obtained within the continuous illness episode which fulfills the other criteria listed below); AND * At least one manifestation of lower respiratory tract infection (LRTI) from among the following: cough, nasal flaring, lower chest wall indrawing, subcostal retractions, stridor, rales, rhonchi, wheezing, crackles/crepitations, or observed apnea; AND * Evidence of medical significance as defined by the presence of: * EITHER hypoxemia (peripheral oxygen saturation \[SpO2\] \< 95% at sea level or \< 92% at altitudes \> 1800 meters) OR * Tachypnea (≥ 70 breaths per minute \[bpm\] in infants 0 to 59 days of age and ≥ 60 bpm in infants ≥ 60 days of age).

Counts and percentage of subjects with solicited injection site and systemic reactogenicity within seven days of vaccination.
Day 0 to Day D+180

In Maternal Subjects

Counts and percentage of subjects with unsolicited (local and systemic) adverse events (AE), unscheduled medically-attended adverse events (MAEs), and serious adverse events (SAEs) through delivery and six (6) months thereafter.
Day 0 to Day D+180

In Maternal Subjects

Clinical safety laboratory assessments of select serum chemistry and hematology parameters through delivery.
Screening to Day 14

In Maternal Subjects

Counts and percentage of subjects with post-immunization onset of specific complications of third-trimester pregnancy and delivery
Day 0 to Day 28 - 42

In Maternal Subjects

Counts and percentage of term healthy infants appropriate for gestational age.
Day 28 - 42

In Infant subjects

Neonatal SAEs (including congenital anomalies, respiratory failure, fever/infection, and neonatal death or other adverse events/complications that necessitate extended hospitalization).
Birth to Day 365

In Infant Subjects

Growth and development over one year
Birth to Day Day 365

In Infant Subjects

Counts and proportion of infants with unsolicited adverse events
Birth to Day 365

In Infant Subjects

Counts and proportions of infants with medically-attended RSV lower respiratory tract infection (LRTI), and age of onset of those infections.
Birth to Day 365

In Infant Subjects

Secondary Endpoints
Infants: Number of Participants With RSV LRTI With Severe Hypoxemia (Sp02 <92% at Sea Level or <87% at Altitudes >1800 Meters) or Documented Use of Oxygen by High Flow Nasal Cannula or Other Advanced Respiratory Support Through 90 Days of Life
Delivery to 180 days after delivery
Infants: Percentages of Participants With RSV LRTI With Hospitalization From Delivery
Delivery to 180 days after delivery
Infant: Number of Participants With Adverse Events (AEs) and Serious Adverse Events (SAEs) During the Neonatal Period and Through the First Year of Life
Delivery to 364 days after delivery
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Study Design & Arms
AllocationRANDOMIZED
MaskingTRIPLE
ModelPARALLEL
PurposePREVENTION
Treatment Arms
ArmTypeDescription
Treatment Group APLACEBO_COMPARATORFormulation buffer (0.5mL injection)
Treatment GroupACTIVE_COMPARATORRSV F vaccine with adjuvant (0.5mL injection)
Treatment Group BEXPERIMENTALRSV F vaccine with adjuvant (0.5mL injection)
Interventions
NameTypeDescription
RSV F vaccine with adjuvantBIOLOGICAL -
Formulation bufferBIOLOGICAL -
Saline Placebo (0.5mL injection)DRUG -
RSV F vaccine (0.5mL injection)DRUG -
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Eligibility Criteria
Age Range18 Years — 40 Years
SexFEMALE
Healthy VolunteersYes
Study Sites88

Inclusion Criteria: 1. ≥18 and ≤40 years-of-age 2. Singleton pregnancy of 28 to 36 0/7 weeks gestation on the day of planned vaccination * Documentation of gestational age will be based on one of the following composite criteria. (Note: The Investigator was to use the earliest ultrasound data a...

Countries:United StatesArgentinaAustraliaBangladeshChileMexicoNew ZealandPhilippinesSouth AfricaSpainUnited Kingdom
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