Data from a Phase 3 study of nirsevimab, a prospective treatment for respiratory syncytial virus (RSV) disease, showed an efficacy rate of 74.5% in infants entering their first season exposed to the virus, according to AstraZeneca Plc. The data were generated by the MELODY trial in which healthy late preterm and term infants were randomised to receive a single dose of nirsevimab or placebo. Altogether 1,490 infants were enrolled in the trial which was conducted across 21 countries. Nirsevimab is a long-acting antibody that is designed to protect infants with a single dose.
