HUNDREDS of women will be contacted after Sydney's Royal Prince Albert Hospital learned a faulty fridge may have destroyed vaccines given to mothers.
RPA general manager Deborah Wilcox this morning told a media conference nine newborn babies had also been immunised with Hepatitis B vaccines from the defective fridge.
A total of 570 mothers will be called after receiving vaccines between August, 2013, and January this year for diseases including measles, mumps, tetanus, whooping cough and diphtheria.
"There is no risk associated with receiving potentially less-effective vaccines," Ms Wilcox said.
"Due to an issue with the refrigerator's thermostat, the vaccines may have been exposed to temperatures just outside of what would be the acceptable, optimal temperature ranges for these types of medications.
"We cannot absolutely guarantee their effectiveness."