How dangerous is the Zika virus in the Pacific?

As the World Health Organisation warns that the zika virus is rapidly spreading across the Americas there are growing concerns about the potential for a larger outbreak in the Pacific. Pregnant women are being warned against travel to 23 countries, mostly in central and South America, but also Samoa. Cases of the virus have been found in both New Zealand and Australia - the mosquitos that can carry Zika are also present in northern Queensland. Professor Dominic Dwyer is a Sydney virologist