Lyme Disease 2026: CDC Warns ER Visits Have Doubled, New Vaccine Nearing Approval

# Lyme Disease 2026: CDC Warns ER Visits Have Doubled, New Vaccine Nearing Approval

> **Quick answer:** CDC data through April 14, 2026 shows 71 out of every 100,000 emergency room visits are now tick-bite-related — more than double the seasonal baseline of 30 per 100,000, and 25% higher than the same period in 2025. The highest-risk window (May 15–July 15) hasn't even started. A new Lyme disease vaccine from Pfizer and Valneva just posted Phase 3 trial results, with an FDA submission planned for 2026.

The 2026 tick season is not a future threat — it is already happening at record pace. Lyme disease 2026 tick season CDC data released this month shows emergency room traffic for tick bites at its highest level since at least 2017, driven by warmer winters, expanding tick habitats, and a nymphal tick population that will only grow more dangerous through mid-July.

Here is what you need to know before your next hike, yard work session, or camping trip.

## How Bad Is the 2026 Tick Surge, Really?

The numbers are striking. As of April 14, 2026, 71 out of every 100,000 emergency room visits in the United States were linked to tick bites — compared to a typical seasonal baseline of roughly 30 per 100,000. That is a more-than-doubling of the expected rate, and it is happening weeks before the peak danger window even opens.