Five new cases of measles have been confirmed in Auckland, taking the total number of cases in the region to nine.
In a statement released this afternoon the Auckland Regional Public Health Service (ARPHS) says four of these new cases are from "household contacts" with an existing case.
However, one of the new cases is a Rodney woman in her forties who can't be linked to an existing case.
ARPHS says this woman is now in isolation but was out in the public while infectious.
"She was infectious when she went to the Countdown supermarket in Silverdale on Monday 18 March at 10am, the Countdown at Orewa at 11am and Oliver’s Cafe in Orewa at midday.
"And the Four Square in Parakai at 4.30pm on Wednesday March 20."
This has led to a warning from the health service.
"Anyone unvaccinated who was at one of these locations around these times or in the following hour may have been exposed to the virus.
"They should watch out for a fever, especially with a runny nose, cough or red eyes. A rash starts on the face a few days later, moving down the body.
"Please consult your general practice if you think you have been exposed to measles, or that you may have it, but phone first."
For more information or advice on measles, please call Healthline on 0800 611 116 or see the Auckland Regional Public Health Service website.