Vaccinating pregnant women with new RSV vaccine helped protect newborns: Pfizer – GLOBAL

November 1, 2022

New research shows vaccinating pregnant women helped protect their newborns from the common but scary respiratory virus called RSV that fills hospitals with wheezing babies each fall.

The preliminary results buoy hope that after decades of failure and frustration, vaccines against RSV may finally be getting close.

Pfizer announced Tuesday that a large international study found vaccinating moms-to-be was nearly 82 per cent effective at preventing severe cases of RSV in their babies’ most vulnerable first 90 days of life. At age six months, the vaccine still was proving 69 per cent effective against serious illness – and there were no signs of safety problems in mothers or babies.

“Moms are always giving their antibodies to their baby,” said virologist Kena Swanson, Pfizer’s vice president of viral vaccines. “The vaccine just puts them in that much better position” to form and pass on RSV-fighting antibodies.

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