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Related Experiment Video

Updated: Mar 19, 2026

Multiplexed Isothermal Amplification Based Diagnostic Platform to Detect Zika, Chikungunya, and Dengue 1

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Published on: March 13, 2018

Social Mixing Patterns and Chikungunya Reemergence Risk in French Polynesia.

Kiyoji-Ken Chung^1,2, Maite Aubry¹, Iotefa Teiti¹

¹Laboratory of Research on Emerging Viral Diseases, Institut Louis Malardé, Papeete, Tahiti, French Polynesia.

JAMA Network Open

|March 18, 2026

Summary

This summary is machine-generated.

High chikungunya virus seroprevalence was found in French Polynesia. Modeling suggests potential for sustained transmission if reintroduced, highlighting the need for accurate outbreak risk assessments.

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Last Updated: Mar 19, 2026

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Published on: August 19, 2017

Area of Science:

Epidemiology
Virology
Public Health

Background:

Chikungunya virus (CHIKV) reemergence in French territories necessitates understanding population immunity and future outbreak risks.
French Polynesia, a Southeast Pacific archipelago, faces potential CHIKV reintroduction.

Purpose of the Study:

To assess CHIKV population immunity in French Polynesia.
To estimate the risk of future CHIKV outbreaks in the region.

Main Methods:

Cross-sectional study utilizing two serosurveys (2018, 2019-2021) of schoolchildren and adults.
Integrated seroprevalence data with contact matrices and demographic characteristics for modeling.
Estimated age-stratified infection proportions, basic reproduction number (R0), and effective reproduction number (Reff).

Main Results:

High seroprevalence observed: 62.8% in schoolchildren and 67.6% in adults.
Factors associated with lower adult seropositivity included male sex, older age groups, Austral subdivision residence, and higher education.
Estimated Reff near 1 (0.95) for 2025, with projections indicating potential exceedance of 1 by 2028 (assortative mixing) or 2051 (random mixing).

Conclusions:

French Polynesia exhibits high CHIKV seroprevalence with significant sociodemographic heterogeneity.
The estimated Reff near 1 suggests sustained transmission is possible upon CHIKV reintroduction.
Contact matrix modeling improves outbreak risk assessment, while random mixing models may underestimate reemergence timing.