Researchers Highlight the Best Time for RSV Vaccine During Pregnancy
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Current guidelines recommend that pregnant people receive a vaccine against respiratory syncytial virus (RSV)-which typically causes mild, cold-like symptoms in most adults but can be deadly for infants during weeks 32–36 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 the American Journal of Obstetrics & Gynecology.
To assess whether maternal vaccine timing is an important consideration for RSV vaccination, the investigators measured RSV antibodies in the umbilical cord at the time of delivery among 124 women who received the RSV vaccine during weeks 32–36 of pregnancy and in the blood of 29 2-month-old infants of these mothers. All study participants were receiving care at Massachusetts General Hospital or Mount Sinai Health System in New York City. Levels of RSV antibodies can predict protection against RSV infection in infants too young to yet receive their own vaccines.
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