Study of the Safety and Immunogenicity of Catch-up Vaccination With a 21-valent Pneumococcal Conjugate Vaccine (PCV21) in Healthy Infants, Toddlers, Children, and Adolescents

Launched by SANOFI PASTEUR, A SANOFI COMPANY · Feb 17, 2025

Keywords

ClinConnect Summary

This clinical trial is studying a new vaccine called PCV21, which is designed to protect against pneumococcal infections. The goal is to see how safe this vaccine is and how well it helps the body build immunity compared to another vaccine called Prevnar 20 (20vPCV). The trial is open to healthy infants, toddlers, children, and adolescents aged 7 months to 17 years who have not had certain previous vaccinations related to pneumococcal disease.

Participants will receive the vaccine and will be monitored for any side effects or reactions. Parents or guardians will need to ensure that their child meets eligibility criteria, such as being healthy with no significant medical conditions that could interfere with the study. It’s important for families to attend all scheduled visits and follow any instructions given by the study team. Overall, this study aims to provide more options for protecting against pneumococcal infections in children and young adults.

Gender

ALL

Eligibility criteria

• Inclusion Criteria:
• • AGE
• • Aged 7 months to 17 years on the day of inclusion
• • TYPE OF PARTICIPANT AND DISEASE CHARACTERISTICS
• • Participants who are healthy as determined by medical evaluation including medical history and physical examination
• • For infants (7 to 11 MoA) and toddlers (12 to 23 MoA) only
• • Born at full term of pregnancy (≥ 37 weeks) and with a birth weight ≥ 2.5 kg or born after a gestation period above 28 (\> 28 weeks) through 36 weeks with a birth weight ≥ 1.5 kg, and in both cases medically stable as assessed by the investigator
• • SEX, CONTRACEPTIVE/BARRIER METHOD AND PREGNANCY TESTING REQUIREMENTS For adolescents (6 to 17 YoA) only
• * 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 pre-menarche 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 the study vaccine administration until at least 4 weeks after the study vaccine administration. A female participant of childbearing potential must have a negative highly sensitive pregnancy test (urine or serum as required by local regulation) within 25 hours of before the first dose of study vaccine.
• • INFORMED CONSENT
• • Assent form has been signed and dated by the participant (based on local regulations), and if applicable, and informed consent form has been signed and dated by the parent(s) or another legally acceptable representative (LAR) and by an independent witness, if required by local regulations
• • OTHER INCLUSIONS
• • Participant and parent(s) / LAR(s) are able to attend all scheduled visits and to comply with all study procedures
• Exclusion Criteria:
• • MEDICAL CONDITIONS
• • Known or suspected congenital or acquired immunodeficiency; or receipt of immunosuppressive therapy, such as anti-cancer chemotherapy or radiation therapy, within the preceding 6 months; or long-term systemic corticosteroid therapy
• • History of microbiologically confirmed S. pneumoniae infection or disease
• • History of seizure or significant stable or progressive neurological disorders such as inflammatory nervous system diseases, encephalopathy, and cerebral palsy
• • Known systemic hypersensitivity to any of the vaccine components, or history of a life-threatening reaction to the vaccines used in the study or to a product containing any of the same substances
• • Laboratory-confirmed thrombocytopenia, or known thrombocytopenia, as reported by the parent(s) / LAR(s), contraindicating intramuscular (IM) injection
• • Bleeding disorder, or receipt of anticoagulants in the 3 weeks preceding inclusion, contraindicating IM injection
• • Chronic illness that, in the opinion of the investigator, is at a stage where it might interfere with study conduct or completion
• • Moderate or severe acute illness/infection (according to investigator judgment) or febrile illness (temperature ≥ 38.0°C \[≥ 100.4°F\]) on the day of vaccine administration.
• • For infants (7 to 11 MoA) and toddlers (12 to 23 MoA) only
• • Previous vaccination against S. pneumonia
• • For children (2 to 5 YoA) and adolescents (6 to 17 YoA) only
• • Previous vaccination with pneumococcal polysaccharide vaccine
• • For adolescents (6 to 17 YoA) only
• • Alcohol, prescription drug, or substance abuse that, in the opinion of the Investigator, might interfere with the study conduct or completion
• • PRIOR/CONCOMITANT THERAPY
• • Receipt of any vaccine in the 4 weeks preceding the vaccine administration or planned receipt of any vaccine in the 4 weeks following the vaccine administration, except for US licensed influenza vaccination, which may be received at least 2 weeks before or 2 weeks after any study vaccination. This exception includes monovalent pandemic influenza vaccines and multivalent influenza vaccines, as applicable per local recommendations
• • Receipt of immune globulins, blood or blood-derived products in the past 3 months
• • For children (2 to 5 YoA) and adolescents (6 to 17 YoA) only
• • Receipt of oral or injectable antibiotic therapy within 72 hours prior to the first blood draw
• • PRIOR/CONCURRENT CLINICAL STUDY EXPERIENCE
• • Participation at the time of study enrollment (or in the 6 weeks preceding the first vaccine administration) or planned participation during the present study period in another clinical study investigating a vaccine, drug, medical device, or medical procedure
• • OTHER EXCLUSIONS For adolescents (6 to 17 YoA) only
• • Deprived of freedom by an administrative or court order, or in an emergency setting, or hospitalized involuntarily
• • Identified as an Investigator or employee of the Investigator or study center with direct involvement in the proposed study, or identified as an immediate family member (ie, parent, spouse, natural or adopted child) of the Investigator or employee with direct involvement in the proposed study
• • The above information is not intended to contain all considerations relevant to a patient's potential participation in a clinical trial