There are still fewer than a dozen cases, but monkeypox is in Australia, and it's spreading. 

It's highly unusual, because it's such a rare disease: our medical system has never had to deal with an outbreak before.

At the same time, Europe, the UK and America are recording hundreds of new infections.

Today, we speak to two US physicians about the treatment of a monkeypox patient, and we ask why the disease is suddenly on the move.

Featured:

Dr Amesh Adalja, infectious disease physician, Johns Hopkins Center for Health Security, Baltimore

Dr Paul Biddinger, vice chairman for emergency preparedness, Massachusetts General Hospital, Boston