Last week an overseas visitor to Victoria was confirmed to have measles. Today, six more people in Victoria have contracted the illness after contact with the visitor at two family events, bringing the total number confirmed cases for the year to 22.

Before the visitor returned to Vietnam, he visited areas in Moonee Ponds, North Melbourne, Coburg, Mount Waverley, Mornington, Williamstown and St Kilda.

The new confirmed cases all had community contact during their infectious periods (but prior to developing symptoms) in a number of locations, including the CBD, Geelong, East Malvern, Chadstone, Noble Park, Hawthorn, Oakleigh, Mount Waverley, Fairfield, South Wharf, Armadale, Abbotsford, East Melbourne, Baxter, Frankston, Karingal and St Kilda Road.

This group of six is the biggest linked cluster of measles in Victoria since an outbreak connected to Melbourne airport early last year, when nine people contracted the disease.

The Department of Health and Human Services is asking people to watch for signs and symptoms of the disease. It’s also urging future travelers to double-check their immunization status and before going abroad, where the disease is more prevalent.

Two doses of the measles, mumps and rubella vaccine (MMR) are necessary to be fully protected, but many adults have only received one. The majority of cases in Victoria this year involve adults who have only been vaccinated once.

The full list of locations, dates and times is below as reported by the Age:

Saturday May 4: The Mornington Hotel, Mornington and Coltman Plaza-Lucas Shopping Centre in Ballarat
Sunday May 5: The Mornington Hotel, Mornington and Quest Services Apartments, St Kilda
Monday May 6: Quest Services Apartments, St Kilda and Priceline Pharmacy, Douglas Parade, Williamstown
Tuesday 7 May 7: Melbourne Airport, Terminal 2 (8.30am-11am) and Vietnam Airlines flight VN780
Saturday May 11: Southern Cross Station Food Court, Melbourne and Holey Moley Mini Golf, Melbourne
Monday May 13: Geelong Public Library, Geelong and The Hot Chicken Project, Geelong
Tuesday May 14: Geelong Public Library, Geelong
Thursday May 16: Chadstone Shopping Centre, Chadstone
Saturday May 18: Oakleigh Masonic Lodge election polling booth, Oakleigh (12pm-1pm) and Chadstone Shopping Centre, Chadstone (5.30pm-7pm)
Sunday May 19: McDonalds, Mount Waverley

Health Victoria advises people who have visited any of the above locations to look out for rash, fever, severe cough and conjunctivitis. If symptomatic, avoid contact with others where possible and make your way to your local GP or hospital.

More information on measles can be found at betterhealth.vic.gov.au.

This article was updated on May 22 to include more detailed location information.