Evaluating the Safety and Immune Response to a Single Dose of a Respiratory Syncytial Virus (RSV) Vaccine in RSV-Seronegative Infants and Children

This is an interventional prevention trial for Respiratory Syncytial Virus Infections Read More

Inclusion Criteria:

• At least 6 months to less than 25 months of age at the time of enrollment
• Parents/guardians who demonstrate their understanding of the study (by taking the comprehension assessment), sign the informed consent, and agree to vaccine administration following detailed explanation of the study
• Seronegative for RSV antibody, defined as a serum RSV neutralizing antibody titer less than 1:40 as determined within 42 days prior to enrollment
• Participant's history has been reviewed and participant has undergone a physical examination indicating that s/he is in good health
• In the view of the site investigator, the participant has received routine immunizations appropriate for their age
• Participant is expected to be available for the duration of the study

Exclusion Criteria:

• Known or suspected impairment of immunological functions, including maternal history of positive HIV test
• Receipt of immunosuppressive therapy including systemic corticosteroids within 30 days of study entry. NOTE: Topical steroids, topical antibiotic, and topical antifungal medications are acceptable within 24 hours of enrollment. May be reassessed after symptoms have resolved.
• Bone marrow/solid organ transplant recipients
• Major congenital malformations, including congenital cleft palate, cytogenetic abnormalities, or serious chronic disorders
• Previous immunization with an RSV vaccine or previous receipt of or planned administration of any anti-RSV antibody product
• Previous serious vaccine-associated AE or any anaphylactic reaction
• Known hypersensitivity to any vaccine component
• Lung or heart disease, including any wheezing event or reactive airway disease. Participants with clinically insignificant cardiac abnormalities requiring no treatment may be enrolled. Participants who had one episode of wheezing or received bronchodilator therapy for a single episode of illness in the first year of life but who have not had any additional wheezing episodes or bronchodilator therapy for at least 12 months may also be enrolled.
• Member of a household that includes an immunocompromised individual or infants less than 6 months of age
• Attends day care with infants less than 6 months of age, and whose parent/guardian is unable or unwilling to suspend daycare for 14 days following immunization. Children who attend facilities that separate children by age and minimize opportunities for transmission of virus through direct physical or aerosol contact are acceptable.
• Fever (rectal temperature of greater than or equal to 100.4°F [38°C]), or upper respiratory illness (rhinorrhea, cough, or pharyngitis) or nasal congestion (that is significant enough to interfere with successful vaccination), or otitis media
• Has received any killed vaccine or live attenuated rotavirus vaccine within the last 2 weeks, any other live vaccine within the last 4 weeks, or gamma globulin (or other antibody products) within the past 3 months or is scheduled to receive any immunization in the 28 days after enrollment
• Receipt of another investigational vaccine or investigational drug within 28 days of receiving this investigational RSV vaccine
• Has received antibiotics or systemic or nasal steroid therapy or other prescription medications for acute illness within 3 days of study entry. Permitted concomitant medications include nutritional supplements, medications for gastroesophageal reflux, eye drops, and topical medications, including (but not limited to) topical steroids, topical antibiotics, and topical antifungal agents.
• Has received salicylate (aspirin) or salicylate-containing products within the past month
• Infants born at less than 37 weeks gestation and less than 1 year of age