Overview
- Health agencies report rising cases with Canada’s Lyme totals climbing from 917 in 2015 to more than 5,200 preliminary cases in 2024 and Montreal recording 161 cases in 2025 while England logged 1,168 confirmed acute cases in 2025.
- Spring 2026 surveillance and U.S. CDC data show early-season spikes in tick encounters and emergency visits, increasing the near-term risk as nymphs that are small and hard to spot become active.
- Experts point to climate and ecological changes—milder winters, longer seasons and shifts in deer and rodent populations—as the main drivers that let ticks survive farther north and expand their habitat.
- Public-health officials warn the threat is broader than Lyme and includes anaplasmosis, babesiosis, Powassan virus and rare conditions such as alpha-gal meat allergy, and they note many infections go uncounted because patients are treated clinically without lab tests.
- Authorities urge simple protections—DEET or icaridin repellents, permethrin-treated clothing, thorough tick checks and fast removal within 24–48 hours—and researchers are building local capacity such as a new Canadian tick research centre while calling for more One Health surveillance and vaccine development.