Reported viral meningitis (aseptic) surveillance for Brazil (BRA) — ▼ Declining · 2025 — latest record 2026-10-13
As of 7 September 2026, Brazil has reported 2,977 viral meningitis (aseptic) cases in 2026, compiled from figures published by SINAN. The full year 2025 closed at 4,765 cases. 2025 closed 24% below the 2023–2024 average, which is why the trend reads “Declining”.
Of the 7 countries reporting viral meningitis (aseptic) to ENCLAI in 2026, Brazil accounts for 94.1% of reported cases and ranks 1 by case count.
ENCLAI has logged 15,738 surveillance records for viral meningitis (aseptic) in Brazil in 2026, with the most detailed reporting in Oct 2026 (15,738 records). 15,738 of those arrived in the last 30 days; the case counts run to 2026-09-07. 1 distinct surveillance sources reported this pair in 2026.
Reporting authorities for these counts: SINAN — Sistema de Informação de Agravos de Notificação
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.
| Year | Reported cases | Share of worldwide reports |
|---|---|---|
| 2023 | 7,175 | 63.3% |
| 2024 | 5,292 | 56.6% |
| 2025 | 4,765 | 66.3% |
| 2026 (year to date) | 2,977 | 94.1% |
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 viral meningitis (aseptic) 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.
| Month | Records | Reporting sources |
|---|---|---|
| Oct 2026 | 15,738 | 1 |
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. 15,738 records were logged in the last 30 days.
Areas within Brazil with the most viral meningitis (aseptic) records this year:
| Area | Records |
|---|---|
| Paraná | 1,027 |
| São Paulo | 1,027 |
| Santa Catarina | 1,018 |
| Pernambuco | 1,005 |
| Minas Gerais | 1,002 |
| Country | 2026 cases | Trend |
|---|---|---|
| Lithuania | 64 | ▲ Rising · 2025 |
| Panama | 47 | |
| Ukraine | 39 | ▼ Declining · 2025 |
| Uruguay | 18 | |
| Hungary | 16 |
| Disease | 2026 cases | Trend |
|---|---|---|
| COVID-19 | 441,893 | |
| Dengue fever | 385,610 | ▼ Declining · 2025 |
| Chikungunya fever | 59,714 | ▼ Declining · 2025 |
| Leprosy | 18,831 | ≈ Stable · 2025 |
| Leptospirosis | 2,531 | ▼ Declining · 2025 |
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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.
