Study backs pertussis vax in late stage of pregnancy

The findings support the 2011 Centers for Disease Control recommendation that women should receive a booster in the second or third trimester.

However, the authors said maternal antibodies waned quickly and it would be best to give the vaccine at 30–32 weeks’ gestation.

The study involved 105 mainly Hispanic women immunised in the previous two months to two years.

Maternal-umbilical cord serum pairs were analysed to see whether passively acquired maternal antibodies could protect the baby

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