Global disease surveillance — 2 countries reporting
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As of 1 November 2026, 21,562 varicella zoster cases have been reported in 2026 by 2 countries; Australia reports the most (21,193), compiled from figures published by Australia NNDSS Fortnightly Report and 2 other reporting authorities.
Category: Vaccine-preventable diseases
Surveillance summary
2026 Cases (YTD)
21,562
Baseline Avg (3yr)
N/A
Trend
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Not comparable: reporting coverage changed (2 countries reported in 2025 vs 1 in 2023–2024 average; 1 in both)
ENCLAI holds 1,022 surveillance records for
Varicella zoster (unspecified) across 2
reporting countries and territories, with the earliest dated
2023 and the most recent
2026-11-01.
Questions about this page
How many varicella zoster cases have been reported worldwide in 2026?
As of 1 November 2026, 21,562 varicella zoster cases have been reported in 2026 by 2 countries; Australia reports the most (21,193), compiled from figures published by Australia NNDSS Fortnightly Report and 2 other reporting authorities.
Which country has reported the most varicella zoster cases in 2026?
Australia has reported the most varicella zoster cases in 2026 (21,193), 98% of the total reported to ENCLAI this year.
Is varicella zoster rising or falling?
No trend is published for varicella zoster: not comparable: reporting coverage changed (2 countries reported in 2025 vs 1 in 2023–2024 average; 1 in both). The reported totals for the compared years come from different sets of countries, so a percentage would compare reporting coverage, not disease.
Where do these varicella zoster counts come from?
Chiefly from Australia NNDSS Fortnightly Report — State/Territory Level, Australia NNDSS Fortnightly Report (Australian CDC) and Australia NNDSS data visualisation tool — monthly notifications, national and state. ENCLAI compiles and normalises the published counts and is not affiliated with these authorities.
Data sources & methodology
About this data: Case counts are aggregated from 444 verified sources including WHO GHO, ECDC, CDC, and national health agencies. The 2026 counts on this page were published chiefly by Australia NNDSS Fortnightly Report — State/Territory Level; Australia NNDSS Fortnightly Report (Australian CDC); Australia NNDSS data visualisation tool — monthly notifications, national and state. ENCLAI is not affiliated with or endorsed by these organisations.
Historical baselines sourced from WHO GHO, WIISE, ECDC Atlas, CDC NNDSS, and IHME GBD — used under open data licences.
How we verify and update data: methodology & Trust Center.
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