Current guidelines recommend that pregnant people receive a vaccine against respiratory syncytial virus (RSV)āwhich typically causes mild, cold-like symptoms in most adults but can be deadly for infantsāduring weeks 32ā36 of pregnancy. New research led by investigators at Mass General Brigham suggests that vaccination earlier in that timeframe, closer to 32 weeks, could provide the best protection for newborns against RSV. The findings are published in theĀ American Journal of Obstetrics and Gynecology.