Overview

• CDC data show ER visits for tick bites in 2025 reached their highest level in five years nationwide, with the Northeast recording 283 visits per 100,000 in May
• Children under 10 and adults over 70 accounted for the largest share of tick bite–related emergency room visits
• Milder winters and ecological shifts such as reforestation and rising deer populations have reduced tick die-off and expanded activity periods
• Phase 3 trials of the Pfizer-Valneva VLA15 Lyme vaccine and late-stage testing of oral anti-tick treatments like TP-05 are on track for regulatory review later this year
• Health agencies continue to recommend EPA-registered repellents, permethrin-treated clothing and daily tick checks to reduce bite and disease risk