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Event Brief

Powassan virus cases hit record high in the US

Powassan virus diagnoses reached a record high in 2025, with no vaccine available.
WHO: Experts
WHAT: Experts warn that Powassan virus, a rare tick-borne illness, has reached record-high US cases in 2025.
WHEN: Jun 29, 2026 at 4:40 PM ET
WHERE: USA
WHY: The virus has reached record highs in 2025, with 76 US diagnoses and no vaccine available.

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