In Western Australia, a measles outbreak has led health authorities to warn people aged between 18 and 30 years to make sure they are vaccinated against the disease. Health Department communicable disease control acting director Gary Dowse stated recently that nine cases of the disease have been confirmed over the last five weeks, including four that required hospitalization. Dowse noted that the outbreak of measles had been linked to a 25-year-old woman who contracted measles while visiting Bali. "Measles will continue to be imported from overseas and is highly infectious, so it is important that we keep our vaccination rates high, or the disease will re-establish itself," he explained.