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

Measles in Portugal: 2026 cases and outbreak reports

Reported measles surveillance for Portugal (PRT) — ▼ Declining · 2025 — latest record 2026-10-31

What the 2026 data shows

As of 31 October 2026, Portugal has reported 9 measles cases in 2026, as published by Direção-Geral da Saúde - comunicados (2 other reporting authorities also report it). The full year 2025 closed at 1 cases. The three-year baseline for Portugal is 23 cases a year. 2025 closed 96% below 3yr avg (WHO historical series), which is why the trend reads “Declining”.

Of the 66 countries reporting measles to ENCLAI in 2026, Portugal accounts for 0.0% of reported cases and ranks 51 by case count.

ENCLAI has logged 80 surveillance records for measles in Portugal in 2026, with the most detailed reporting in Apr 2026 (26 records). 3 of those arrived in the last 30 days; the case counts run to 2026-10-31. 5 distinct surveillance sources reported this pair in 2026.

Reporting authorities for these counts: ECDC Surveillance Atlas — Portugal Region-Level (population-weighted) · Direção-Geral da Saúde - comunicados · ECDC Surveillance Atlas of Infectious Diseases

Key facts: Measles

Transmission
Airborne
Droplets and aerosols; contagious in air or on surfaces for up to 2 h. Infectious from 4 days before to 4 days after the rash.Plotkin's 8e · WHO 2026
Incubation
12.5 days (median)
95% CI 11.8–13.2; symptoms usually 7–14 days after exposure (range 7–18).Plotkin's 8e · WHO 2026 · Oxford Hb 2025
Vaccine
MCV, 2 doses · ≈95%
Live attenuated; dose 1 at 9 months where measles is common (12–15 months elsewhere), dose 2 at 15–18 months. Two-dose effectiveness ≈95% (95% CI 89–100).WHO 2026 · Plotkin's 8e

Cited reference facts about the disease, not derived from the surveillance counts on this page. Full set on the Measles page.

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Surveillance summary

2026 cases (YTD)
9
2025 cases (full year)
1
Baseline avg (3yr)
23
Trend (2025)
▼ Declining · 2025
-96% vs 3yr avg

Reported cases by year, Portugal

YearReported casesShare of worldwide reports
2023 not reported —
2024 not reported —
2025 1 0.0%
2026 (year to date) 9 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 measles 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
Jan 202622
Feb 202622
Mar 202632
Apr 2026264
May 2026124
Jun 202622
Jul 202643
Aug 2026253
Sep 202611
Oct 202633

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. 3 records were logged in the last 30 days.

Sub-national reporting, 2026

Areas within Portugal with the most measles records this year:

AreaRecords
Centro13
Região Autónoma da Madeira12
Área Metropolitana de Lisboa11
Norte11
Alentejo5

Measles in other countries, 2026

Country2026 casesTrend
Guatemala 34,400
Mexico 13,148
Cameroon 9,660 (outbreak total to date)
Nigeria 7,713 ▼ Declining · 2025
South Africa 3,462 (outbreak total to date)

Other diseases reported in Portugal, 2026

Disease2026 casesTrend
Seasonal influenza 3,959 ▲ Rising · 2025
Respiratory syncytial virus infection 2,731 ≈ Stable · 2025
COVID-19 1,804 ▼ Declining · 2025
Mpox (monkeypox) 68 (outbreak total to date)

Questions about this page

How many measles cases has Portugal reported in 2026?
As of 31 October 2026, Portugal has reported 9 measles cases in 2026, as published by Direção-Geral da Saúde - comunicados (2 other reporting authorities also report it). The full year 2025 closed at 1 cases. The three-year baseline for Portugal is 23 cases a year. 2025 closed 96% below 3yr avg (WHO historical series), which is why the trend reads “Declining”.
Is measles rising or falling in Portugal?
ENCLAI's trend reading for measles in Portugal 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 Portugal publish measles surveillance data?
The counts on this page were published by ECDC Surveillance Atlas — Portugal Region-Level (population-weighted), Direção-Geral da Saúde - comunicados and ECDC Surveillance Atlas of Infectious Diseases. 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. Portugal 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 measles records for Portugal dated from 2020. 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.