Two more cases of measles have been identified in Victoria, taking the total number of people infected in the past fortnight to seven and prompting fears the disease could be spreading.

The Department of Health & Human Services confirmed the latest cases on Thursday afternoon, one day after announcing another person with measles was among 95,000 football fans at the MCG on Saturday.

Deputy Chief Health Officer Dr Brett Sutton said the new cases had a connection with one of the earlier cases through a workplace.

He said people who work in or around the Collins Square building in Collins St at Docklands need to be alert to symptoms of the illness.

The department is worried by the fact the two people went through Melbourne International Airport on September 24, spending time in the Qantas Club Lounge before boarding Qantas flight QF 29 to Hong Kong.

During the period they were infected, the pair also attended a performance of Alice's Adventures in Wonderland at the State Theatre, as well as visiting shopping centres, a cafe, an ice cream parlour and other venues.

Dr Sutton said anyone infected by the latest patients might show symptoms up until mid-October, as the disease has an incubation period of up to 18 days.

The disease is now uncommon in Australia because of the widespread use of the measles vaccine.

Locations at risk from latest cases

Whereabouts of the two latest people diagnosed with measles:

September 22: The Australian Ballet's Alice's Adventures in Wonderland at the State Theatre.

September 23: Oscar Cooper Café, Greville St, Prahran; Pidapipo Icecream, Chapel St, Windsor; Maribyrnong Boathouse the Boulevard, Moonee Ponds; Lincoln St Hair Salon, Essendon; and the Corner Store Café, Yarraville.

September 24: Melbourne International Airport, Qantas Club Lounge (8-10am); Qantas flight QF 29 to Hong Kong; KMart Moonee Ponds; DFO Essendon; Little Byrd Café, Union Rd, Ascot Vale.