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

Seasonal influenza in Lithuania: 2026 cases and outbreak reports

Reported seasonal influenza surveillance for Lithuania (LTU) — ▲ Rising · 2025 — latest record 2026-10-16

What the 2026 data shows

As of 14 September 2026, Lithuania has reported 927 seasonal influenza cases in 2026, as published by ECDC EU/EEA Respiratory Virus Weekly Data (GitHub) (1 other reporting authority also reports it). The full year 2025 closed at 2,003 cases. 2025 closed 143% above the 2023–2024 average, which is why the trend reads “Rising”.

Of the 45 countries reporting seasonal influenza to ENCLAI in 2026, Lithuania accounts for 0.0% of reported cases and ranks 29 by case count.

ENCLAI has logged 377 surveillance records for seasonal influenza in Lithuania in 2026, with the most detailed reporting in Apr 2026 (226 records). 7 of those arrived in the last 30 days; the case counts run to 2026-09-14. 2 distinct surveillance sources reported this pair in 2026.

Reporting authorities for these counts: NVSC — Lithuania (via data.gov.lt UAPI dataset 1852) · ECDC EU/EEA Respiratory Virus Weekly Data (GitHub)

Key facts: Seasonal influenza

Transmission
Droplets
Coughs and sneezes infect people in close proximity.WHO 2025
Incubation
≈ 2 days
Range 1–4 days.WHO 2025
Vaccine
Annual vaccine
Priority: pregnant women, children 6 months–5 years, over-65s, chronic conditions, health workers. Less effective in older people but cuts severity and death.WHO 2025

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

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Surveillance summary

2026 cases (YTD)
927
2025 cases (full year)
2,003
Baseline avg (3yr)
N/A
Trend (2025)
▲ Rising · 2025
+143% vs 2023–2024 average

Reported cases by year, Lithuania

YearReported casesShare of worldwide reports
2023 568 0.1%
2024 1,078 0.1%
2025 2,003 0.0%
2026 (year to date) 927 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 seasonal influenza 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
Apr 20262261
Jun 20261351
Aug 202691
Oct 202671

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. 7 records were logged in the last 30 days.

Seasonal influenza in other countries, 2026

Country2026 casesTrend
China 2,235,702
Australia 269,750
Germany 186,937 ▲ Rising · 2025
Ukraine 33,426 ▲ Rising · 2025
Canada 30,717

Other diseases reported in Lithuania, 2026

Disease2026 casesTrend
Viral gastroenteritis, unspecified 8,550 ▲ Rising · 2025
Lyme borreliosis 8,166 ▲ Rising · 2025
Varicella 5,177 ▲ Rising · 2025
Rotavirus enteritis 2,214 ▲ Rising · 2025
Scabies 1,726 ▲ Rising · 2025

Questions about this page

How many seasonal influenza cases has Lithuania reported in 2026?
As of 14 September 2026, Lithuania has reported 927 seasonal influenza cases in 2026, as published by ECDC EU/EEA Respiratory Virus Weekly Data (GitHub) (1 other reporting authority also reports it). The full year 2025 closed at 2,003 cases. 2025 closed 143% above the 2023–2024 average, which is why the trend reads “Rising”.
Is seasonal influenza rising or falling in Lithuania?
ENCLAI's trend reading for seasonal influenza in Lithuania is “Rising · 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 Lithuania publish seasonal influenza surveillance data?
The counts on this page were published by NVSC — Lithuania (via data.gov.lt UAPI dataset 1852) and ECDC EU/EEA Respiratory Virus Weekly Data (GitHub). 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. Lithuania 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 seasonal influenza records for Lithuania dated from 2009. 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.