High alert for measles in NSW

Three babies have contracted measles in Sydney's west, prompting health officials to warn that the potentially deadly virus is circulating.

Dr Vicky Sheppeard, from the Western Sydney Public Health Unit, said the three infants had been recently diagnosed with the highly infectious disease at the ED at the Children's Hospital at Westmead, Sydney.

People who may have been exposed in the hospital in the days around 11 May are now being contacted, as symptoms could potentially appear any time before the end of the month, Dr Sheppeard said.

She said other people had contracted measles in recent months after visiting medical centres in Western Sydney and shopping centres in the Blue Mountains and Penrith.

High vaccination rates have meant the virus is uncommon, but NSW Health is warning it is now circulating in the community.

People with symptoms are being urged to contact their ED before arriving at the hospital to ensure they are isolated upon arrival.

And those who have not received vaccinations are being urged to do so.