Dengue fever in Thailand: 2026 cases and outbreak reports
Reported dengue fever surveillance for Thailand (THA)
—
— latest record 2026-10-06
What the 2026 data shows
No dengue fever case count has been reported for Thailand so far in 2026. No 2025 figure has been reported.
ENCLAI has logged 168 surveillance records for dengue fever in Thailand in 2026, with the most detailed reporting in Oct 2026 (157 records); the case counts run to 2026-10-18. 5 distinct surveillance sources reported this pair in 2026.
Reporting authorities for these counts: Thailand DDC Division of Epidemiology — DDS disease situation reports
Key facts: Dengue fever
Transmission
Aedes aegypti bite
Other Aedes species also transmit. Extrinsic incubation in the mosquito ≈8–12 days at 25–28 °C.WHO 2025 · CDC 2025
Incubation
4–6 days (up to 14)
After the bite; illness lasts 2–7 days and most recover in about a week.Oxford Hb 2025 · CDC 2025
Vaccine
TAK-003 (Qdenga)
WHO-recommended for children aged 6–16 in high-transmission settings; further vaccines under evaluation.WHO 2025
Cited reference facts about the disease, not derived from the surveillance counts on this page. Full set on the Dengue fever page.
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Surveillance summary
2026 cases (YTD)
not reported
2025 cases (full year)
not reported
Baseline avg (3yr)
N/A
Trend (2025)
—
No 2025 figure
Reported cases by year, Thailand
Year
Reported cases
Share of worldwide reports
2023
160,839
6.9%
2024
103,601
1.4%
2025
not reported
—
2026 (year to date)
not reported
—
Reporting bounds and case definitions vary; historical baselines are a separate comparison measure. Worldwide share compares this country's reported figure with the sum of all countries reporting dengue fever to ENCLAI for that year. "Incomplete year" means our sources cover less than ten months of that year, so no full-year figure is shown; "outbreak total to date" is a running total since an outbreak began, not a count for one year.
Surveillance records logged in 2026
Month
Records
Reporting sources
Apr 2026
4
2
Jul 2026
3
1
Aug 2026
1
1
Sep 2026
3
2
Oct 2026
157
2
A record is one dated surveillance publication or one row of an official table; a month with many records is a month with detailed reporting, not necessarily more cases.
Sub-national reporting, 2026
Areas within Thailand with the most dengue fever records this year:
How many dengue fever cases has Thailand reported in 2026?
No dengue fever case count has been reported for Thailand so far in 2026. No 2025 figure has been reported.
Where does Thailand publish dengue fever surveillance data?
The counts on this page were published by Thailand DDC Division of Epidemiology — DDS disease situation reports. ENCLAI compiles and normalises them and is not affiliated with these authorities.
About this data
Figures are reported case counts as published by the originating health authorities, compiled by ENCLAI from 444 verified surveillance sources. Thailand figures reflect the reporting available to ENCLAI; reporting periods and case definitions differ between sources, and a missing report does not establish zero cases.
ENCLAI holds dengue fever records for Thailand dated from 2010.
How we verify and update data: methodology & Trust Center · understanding case counts.
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source named for every number. Reported facts only — no forecasts and no
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