Queensland has confirmed its first case of Zika as the world deals with the threat posed by the virus.

A woman is recovering on the Gold Coast after returning from El Salvador, where the mosquito-borne disease is spreading quickly.

Queensland Health says she's left hospital and does not pose a risk to the public.

The case comes after a West Australian adult was diagnosed with Zika after recently returning from Central America.

The federal government in Australia is confident a strong focus on combating malaria across Pacific island nations will hold the region in good stead against the Zika virus.

Tonga declared an epidemic this week with five confirmed cases and 259 suspected cases.

Samoa had three confirmed cases in September and October last year and its government has set up seven surveillance sites and has stepped up fogging.

French Polynesia and Vanuatu have also had outbreaks in recent years.