Cumulative cases since outbreak start — WHO bulletin dated 2025-12-31
Official report date — in isolated zones, field onset typically precedes this by days to weeks.
The exact nature of this date (week of confirmation, transmission period, or bulletin publication date) is not specified by the source.
WHO Rapid Risk Assessment (24 April 2026): Thailand reported 1,405 chikungunya cases across all of 2025 (roughly double 2024's 722), with Chiang Mai province the most affected. No 2026 continuation was reported in this assessment.
Case trend
Cite this page (Vancouver)
HealthWatch Global. Chikungunya outbreak — Thailand [Internet]. 2025-12-31 [cited 2026 Aug 19]. Available from: https://healthwatch-global.com/en/outbreak/29fcfb56-0c36-4145-836b-f68c24a3ee5f. Data source: WHO.
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