Melbourne's population continues to grow, but there are growing calls for services such as public transport to be expanded to match the boom.

In short

• Victorian health authorities have detected and treated a cooling tower believed to be the source of a legionnaires' disease outbreak in Melbourne.

• Chief health officer Dr Clare Looker believes the peak of the outbreak has passed.

What's next?

• Health authorities will continue to test cooling towers in the unlikely event of a second source of the spread of the outbreak.