Respiratory Syncytial Virus Infections Clinical Trial
Official title:
A Phase 3, Randomized, Double-Blind, Placebo-Controlled Study Evaluating the Efficacy and Safety of a Human Monoclonal Antibody, REGN2222, for the Prevention of Medically Attended RSV Infection in Preterm Infants
The purpose of this study was to evaluate the efficacy, safety, pharmacokinetics (PK), and immunogenicity of suptavumab (REGN2222) in infants born no more than 35 weeks, 6 days gestational age who are no more than 6 months of age at the time of enrollment in their respective geographic location. In order to optimize the potential benefit in this vulnerable population, we conducted this study during the RSV season using dosing regimens that are expected to be effective.
This study occurred in two parts: Part A and Part B.
Part A of the study was an open-label, PK evaluation of intramuscular (IM) administered
suptavumab in preterm infants for whom palivizumab was not recommended to enable the
selection of dosing regimens for Part B.
Part B of the study was randomized, double-blind, and placebo-controlled, designed to
evaluate efficacy, safety, serum concentration and immunogenicity of IM administration of
suptavumab in preterm infants for whom palivizumab was not recommended. The total duration of
Part B was up to 265 days (includes a 28-day screening period, 57-day treatment period and
180-day follow-up period).
Up to 1515 subjects were planned to be included in Part B of the study. Participants were
randomly assigned to 1 of 3 different groups, each with 505 infants; one group received one
dose of suptavumab and one dose of placebo, the second group received two doses of
suptavumab, and the third group received two doses of placebo.
There was a separate genetic testing sub study.
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