Health alert issued after 2 contract measles at Australian university

Thousands of university graduates and their families exposed to the measles virus while attending a graduation ceremony in Melbourne, Australia were assured by their university on Tuesday that those vaccinated should be immune.
An 11-year-old from Victoria and a 17-year-old from the Northern Territory, who both contracted the virus, had no connection other than they both attended the Royal Melbourne Institute of Technology graduation ceremony in Melbourne on Dec. 17.
"Anyone with documented evidence of measles in the past or record of vaccination against measles is considered immune," the university said on Twitter on Tuesday.
All staff and graduates were advised via email of the two confirmed cases on Monday evening, a day after the maximum incubation period for the disease had lapsed.
Victoria's Chief Health Officer Dr Rosemary Lester confirmed to the Australian Broadcasting Corporation on Tuesday that the infected pair was not vaccinated.
"We think that they've almost certainly contracted the measles at the ceremony from someone who is probably unidentified who was infectious at the time," said Dr Lester.