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

Dengue fever in Spain: 2026 cases and outbreak reports

Reported dengue fever surveillance for Spain (ESP) — ▼ Declining · 2025 — latest record 2026-10-02

What the 2026 data shows

As of 6 September 2026, Spain has reported 246 dengue fever cases in 2026, compiled from figures published by Spain CNE-ISCIII. The full year 2025 closed at 326 cases. 2025 closed 65% below 2024, which is why the trend reads “Declining”.

Of the 43 countries reporting dengue fever to ENCLAI in 2026, Spain accounts for 0.0% of reported cases and ranks 25 by case count.

ENCLAI has logged 82 surveillance records for dengue fever in Spain in 2026, with the most detailed reporting in Oct 2026 (82 records); the case counts run to 2026-09-06. 1 distinct surveillance sources reported this pair in 2026.

Reporting authorities for these counts: Spain CNE-ISCIII — RENAVE weekly bulletin (notifiable diseases; meningococcal, measles, rubella by community)

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)
246
2025 cases (full year)
326
Baseline avg (3yr)
N/A
Trend (2025)
▼ Declining · 2025
-65% vs 2024

Reported cases by year, Spain

YearReported casesShare of worldwide reports
2023 not reported —
2024 933 0.0%
2025 326 0.0%
2026 (year to date) 246 0.0%

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

MonthRecordsReporting sources
Oct 2026821

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.

Dengue fever in other countries, 2026

Country2026 casesTrend
Brazil 385,610 ▼ Declining · 2025
Vietnam 131,202
Bangladesh 115,617
Colombia 97,678
Sri Lanka 93,420

Other diseases reported in Spain, 2026

Disease2026 casesTrend
Herpes zoster 51,188 ▲ Rising · 2025
Campylobacteriosis 16,001 ▼ Declining · 2025
Chlamydia infection 14,648 ▼ Declining · 2025
Gonococcal infection 14,205 ▼ Declining · 2025
Non-typhoidal salmonellosis 6,001 ≈ Stable · 2025

Questions about this page

How many dengue fever cases has Spain reported in 2026?
As of 6 September 2026, Spain has reported 246 dengue fever cases in 2026, compiled from figures published by Spain CNE-ISCIII. The full year 2025 closed at 326 cases. 2025 closed 65% below 2024, which is why the trend reads “Declining”.
Is dengue fever rising or falling in Spain?
ENCLAI's trend reading for dengue fever in Spain is “Declining · 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 Spain publish dengue fever surveillance data?
The counts on this page were published by Spain CNE-ISCIII — RENAVE weekly bulletin (notifiable diseases; meningococcal, measles, rubella by community). 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. Spain 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 Spain dated from 2024. 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.