The Goulburn Valley Public Health Unit said recent cases had been identified among people who had not travelled overseas or visited known exposure sites — a sign the virus was spreading within the community.
The development has heightened concern among health authorities, which say vaccination remains the best defence against the highly contagious disease.
GVPHU clinical director Dr Will Cross said many people in the region may not have the full protection needed to prevent infection.
“Measles spreads very easily through the air when someone coughs or sneezes, and also by contact with surfaces and objects touched by infectious people,” he said.
“Many members of our community have not received the two vaccination doses required for safe and long-lasting immunity, particularly those between the ages of 20 and 60.
“We recommend that anyone unsure about their vaccination history check their records with a health provider and receive any additional doses if needed.”
The measles, mumps and rubella vaccine offers the best protection against measles and is available free to eligible people through the National Immunisation Program and Victorian Government-funded initiatives.
Under these programs, free vaccinations are available for infants at 12 months and again at 18 months.
Children, young people and adults born after 1966 who do not have two documented doses or proof of immunity are also eligible.
To make vaccination easier and more accessible, GVPHU is supporting an expanded community pharmacy initiative through ‘The Vaccination Hub’, allowing eligible residents to receive free MMR vaccinations at participating pharmacies.
Vaccines are also available through local GPs, Greater Shepparton City Council services and Aboriginal health organisations.
“Measles is on the rise, but it is preventable,” Dr Cross said.
“Getting vaccinated is one of the simplest and most effective steps you can take to protect yourself, your family and the wider community.”
Residents who develop symptoms or believe they may have been exposed to measles are advised to seek medical advice immediately.
Health authorities recommend calling ahead before visiting a clinic and staying home to avoid contact with others.