Recent measles infections in Gippsland and Melbourne have led to a plea for people to be vaccinated against the disease.
Gippsland Public Health Unit's infectious diseases physician Alex Tai said those born after 1965 or were born overseas were eligible for a free catch-up measles-mumps-rubella vaccine to ensure they were fully immunised.
Those people may have only received one childhood vaccination.
Dr Tai said babies between 12 and 18 months of age could be vaccinated against measles under the National Immunisation Program and those aged between six and 12 months should get an extra vaccine if they were to travel to countries where there are outbreaks.
He said people most at risk of the highly infectious viral disease were those who had never had measles or had not been fully immunised with two vaccine doses.
The greatest risk of developing serious measles complications were children under five years of age, people that are pregnant and those with a weakened immune system.
People that were unsure of their status should see a general practitioner (GP) or a pharmacy.
Dr Tai said symptoms including a fever, cough, red eyes, runny nose followed by a red rash usually appear seven to 18 days after exposure.
Those that develop symptoms should see their doctor.
Dr Tai assured people that the vaccine was safe and highly effective.