A further four measles cases have been confirmed in Darwin over the past two days.
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Two were babies under two years old.
The outbreak of measles which began in mid-February now totals eight cases.
According to the Director at the Centre for Disease Control (CDC), Dr Vicki Krause, it is unclear where the new cases acquired the disease.
"There is no direct link to the previous cases and no recent overseas travel," Dr Krause said.
"Knowing how very contagious measles is, there are likely to be further people with symptoms of measles in Darwin now and for the next several weeks."
More Reading: NT measles alert
Of the four new cases, two were teenagers and two were babies under two years old.
According to CDC, one of the cases attended Palmerston Community Care Centre on Friday March 15 and then Roseberry Top End Medical Centre and Palmerston Regional Hospital on Saturday March 16.
Another case was seen in Palmerston Regional Hospital Emergency Department on March 17 and had been attending Palmerston Christian School in the days prior to diagnosis.
CDC is working with the christian school to provide important information to students and staff.
One of the cases attended several dance classes in the Palmerston area and at the Entertainment Centre in Darwin as well as visiting Gateway and Bunnings in Palmerston.
Territorians are being urged to get their free measles vaccine, known as the measles-mumps-rubella (MMR) vaccine, if they are not immune.
"To be immune to measles you must have either previously had measles, had two doses of the measles-containing vaccine, known as the measles-mumps-rubella (MMR) vaccine (the vaccine is given as part of the routine national vaccination schedule at 12 months and at 18 months)," Dr Krause said.
"For people born between 1966 and 1996, you may have only had one dose and should check your records to see if you have had two vaccines," she said.
The contagious disease is spread between people through coughing and sneezing.
Symptoms include fever, cough, runny nose and sore eyes, which usually occur 7-10 days after exposure to a case, followed a few days later by a red blotchy rash which often starts on the face and then becomes widespread over the body.
"If you think you or someone you are caring for might have measles, make sure you call ahead to the medical practice before you attend, so that staff there can take the necessary precautions to avoid potential spread to others," Dr Krause said.
For further information about measles click here.
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