Vanuatu health authorities are stepping up surveillance for cases of the virus.
It's small, shanty towns in Port Vila that cause the most concern for those fighting the spread of mosquito-borne illness.
Frederick Yakeula from Vanuatu's public heath team has been inspecting a labyrinth of corrugated iron buildings.
Breeding in stagnant water containers throughout the settlement is the Aedes larvae, which will eventually turn into the same type of mosquito that spreads the Zika virus.
“It's a very big risk for the community, this one,” says Yakeula.
Communities in Vanuatu rely on containers to collect rainwater, so even though it is potentially dangerous, no one wants the authorities to take them away.
Resident Tom Joel says the tanks are essential, as there is no central piped system for the community.
“We use [the water] for drinking, use for cooking our food in the community, and we wash our clothes,” he says.
There was one confirmed case of Zika in Vanuatu last year, as there have been in many other places around the Pacific.
“Here in Vanuatu, a large outbreak in French Polynesia, the Cook Islands, and currently in Samoa, we are seeing a small outbreak of Zika,” says Dr Jacob Kool.
Dr Kool helped identity the first case of Zika on the tiny island of Yap in Micronesia in 2007. He now works in Port Vila, where he says health teams are preparing to increase awareness about the virus.
“Now it's becoming a concern,” says Dr Kool. “We will be strengthening surveillance for Zika virus. There will be much better testing and reporting of cases of Zika."
He says any further suspected cases in Vanuatu will be sent overseas for testing.
“I think we should ramp up our surveillance and really try to do it for every single case.”
In the meantime, he advises pregnant women to rethink their tropical holiday, especially in places in the Pacific where cases have been confirmed.
“If it was just a vacation, if it was my family, you need to think twice if you have to do that vacation now or whether you could wait a few months.”
Health authorities are asking anyone with symptoms, including fever or redness in the eyes, to see a doctor.
As well as emptying water containers that could become breeding sites, they say people in vulnerable communities should use mosquito nets and insect repellent