Health authorities in the Pacific region are warning people in the islands to be vigilant about mosquito borne diseases.
In French Polynesia, about one in ten people is reportedly being affected by zika virus, a dengue-like illness.
Health officials in New Caledonia are urging people to use repellent and guard against mosquitoes following reported cases of zika, chikungunya and dengue fever.
Similar warnings about dengue fever have been issued in Fiji.
The WHO's Dr Eric Nilles says Pacific Island countries must all increase their surveillance against arborviruses.
"When we see an outbreak of chikungunya as we are seeing in the North Pacific now, that is something that we pay attention to and we do monitor closely. Similarly for the zika virus that is not normally a virus that we see circulating in the Pacific, it's something that we pay particular attention to."
Dr Eric Nilles says it is important that people remove mosquito breeding sites to prevent the spread of the arborviruses.
