ACT health authorities have confirmed a case of measles in a recently returned overseas traveller and are urging anyone who visited a number of public locations to monitor for symptoms.

The Health and Community Services Directorate said the person was not infectious while travelling but developed measles after returning to Canberra.

The case visited several locations across the ACT while unknowingly infectious between July 20 and July 24, including Services Australia offices in Greenway and Forrest, Betty Botter Café in Forrest, Woolworths Mawson, Ochre Medical Centre Tuggeranong Square, Capital Pathology at Tuggeranong Square and ACT Pathology at Canberra Hospital.

The directorate said the locations no longer pose an ongoing risk but people who were at the listed venues during the specified times should watch for symptoms until the relevant monitoring dates, which extend to August 11.

Symptoms can take up to 18 days to appear after exposure and include fever, tiredness, runny nose, sore and red eyes, cough, and a blotchy red rash that starts on the face before spreading across the body.

Anyone who develops symptoms is advised to call ahead before attending a GP, health service or emergency department and to wear a face mask when seeking medical care.

People who have not received two doses of a measles-containing vaccine, or are unsure of their vaccination status, are encouraged to speak with a GP or pharmacist about vaccination. The vaccine is free in the ACT, although an administration fee may apply.

The directorate is also asking people who have weakened immune systems, are pregnant and unvaccinated, or have infants under 12 months of age or children under 18 months who have not been vaccinated against measles to contact the Health and Community Services Directorate for advice.

Measles is a highly contagious viral disease spread through coughing and sneezing. Health authorities say vaccination remains the best protection, with two doses of a measles-containing vaccine providing the highest level of immunity.

Health officials noted that many Australians born between 1966 and the mid-1990s may have received only one measles vaccine during childhood and are encouraged to receive a second dose if needed.

Here is the full list of exposure sites and times:

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