On 24 November 2015, health authorities in French Polynesia reported unknown and unspecified causes of morbidity and mortality in the context of concomitant outbreaks of Zika and dengue (serotypes 1 and 3) viruses. This update provides additional information on the clinical findings as well as the epidemiological and laboratory investigations of these cases.
Between October 2013 and April 2014, French Polynesia experienced the largest Zika virus outbreak ever recorded in the country. During this period of time, 32,000 patients (11.5% of the population) were assessed for the infection and 8,750 suspected cases were reported by the national surveillance system. Of the suspected cases, 383 were later laboratory-confirmed by reverse transcription polymerase chain reaction (RT-PCR).