Compiled by the ENCLAI research team following a documented methodology · Editorial oversight: Dr Natalya Mathur, Founder · Data last updated: (UTC)

Japanese encephalitis in Taiwan: 2026 cases and outbreak reports

Reported japanese encephalitis surveillance for Taiwan (TWN) — ≈ Stable · 2025 — latest record 2026-11-07

What the 2026 data shows

As of 31 October 2026, Taiwan has reported 15 japanese encephalitis cases in 2026, as published by Taiwan CDC. The full year 2025 closed at 22 cases. 2025 closed 14% below the 2023–2024 average, which is why the trend reads “≈ Stable”.

Of the 3 countries reporting japanese encephalitis to ENCLAI in 2026, Taiwan accounts for 53.6% of reported cases and ranks 1 by case count.

ENCLAI has logged 238 surveillance records for japanese encephalitis in Taiwan in 2026, with the most detailed reporting in Jun 2026 (220 records). 5 of those arrived in the last 30 days; the case counts run to 2026-10-31. 1 distinct surveillance sources reported this pair in 2026.

Reporting authorities for these counts: Taiwan CDC — Disease Surveillance Express (weekly national)

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Surveillance summary

2026 cases (YTD)
15
2025 cases (full year)
22
Baseline avg (3yr)
N/A
Trend (2025)
≈ Stable · 2025
-14% vs 2023–2024 average

Reported cases by year, Taiwan

YearReported casesShare of worldwide reports
2023 26 28.6%
2024 25 46.3%
2025 22 12.9%
2026 (year to date) 15 53.6%

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 japanese encephalitis 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

MonthRecordsReporting sources
Jun 20262201
Jul 202641
Aug 202641
Sep 202641
Oct 202651
Nov 202611

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. 5 records were logged in the last 30 days.

Japanese encephalitis in other countries, 2026

Country2026 casesTrend
South Korea 9 ▼ Declining · 2025
Australia 4

Other diseases reported in Taiwan, 2026

Disease2026 casesTrend
Seasonal influenza 1,987 ▲ Rising · 2025
Tuberculosis 1,129
COVID-19 817 ▲ Rising · 2025
Hepatitis A 677 ▲ Rising · 2025
Legionnaires' disease 573 ▲ Rising · 2025

Questions about this page

How many japanese encephalitis cases has Taiwan reported in 2026?
As of 31 October 2026, Taiwan has reported 15 japanese encephalitis cases in 2026, as published by Taiwan CDC. The full year 2025 closed at 22 cases. 2025 closed 14% below the 2023–2024 average, which is why the trend reads “≈ Stable”.
Is japanese encephalitis rising or falling in Taiwan?
ENCLAI's trend reading for japanese encephalitis in Taiwan is “≈ Stable · 2025”: the latest complete year is compared with the earlier baseline from the reported counts; the current year is not judged until it closes.
Where does Taiwan publish japanese encephalitis surveillance data?
The counts on this page were published by Taiwan CDC — Disease Surveillance Express (weekly national). 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. Taiwan 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 japanese encephalitis records for Taiwan dated from 2019. How we verify and update data: methodology & Trust Center · understanding case counts.

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The daily disease brief

One email a day: what changed in official disease reporting worldwide, with the source named for every number. Reported facts only — no forecasts and no interpretation.

Double opt-in — we send a confirmation link and nothing else until you click it. One-click unsubscribe on every email. See our privacy notice.