Seasonal influenza in Guernsey: 2026 cases and outbreak reports
Reported seasonal influenza surveillance for Guernsey (GGY)
— ≈ Stable · 2025
— latest record 2026-10-07
What the 2026 data shows
No seasonal influenza case count has been reported for Guernsey so far in 2026. The full year 2025 closed at 118 cases. 2025 closed 10% above the 2023–2024 average, which is why the trend reads “≈ Stable”.
ENCLAI has logged 6 surveillance records for seasonal influenza in Guernsey in 2026, with the most detailed reporting in Oct 2026 (6 records). 1 distinct surveillance sources reported this pair in 2026.
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)
not reported
2025 cases (full year)
118
Baseline avg (3yr)
N/A
Trend (2025)
≈ Stable · 2025
+10% vs 2023–2024 average
Reported cases by year, Guernsey
Year
Reported cases
Share of worldwide reports
2023
118
0.0%
2024
96
0.0%
2025
118
0.0%
2026 (year to date)
not reported
—
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
Month
Records
Reporting sources
Oct 2026
6
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.
How many seasonal influenza cases has Guernsey reported in 2026?
No seasonal influenza case count has been reported for Guernsey so far in 2026. The full year 2025 closed at 118 cases. 2025 closed 10% above the 2023–2024 average, which is why the trend reads “≈ Stable”.
Is seasonal influenza rising or falling in Guernsey?
ENCLAI's trend reading for seasonal influenza in Guernsey 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.
About this data
Figures are reported case counts as published by the originating health authorities, compiled by ENCLAI from 444 verified surveillance sources. Guernsey 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 Guernsey dated from 2019.
How we verify and update data: methodology & Trust Center · understanding case counts.
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source named for every number. Reported facts only — no forecasts and no
interpretation.
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