4 trends tracked about this subject — the full history, oldest to newest below.
Health experts are monitoring a surge in cases of anaplasmosis, a tick-borne disease linked to heart inflammation that often lacks a characteristic rash.
Public health agencies are monitoring a rise in Powassan virus cases across the United States as the first 2026 diagnosis is confirmed in Maine.
The lone star tick is expanding its range, triggering rising concerns over alpha-gal syndrome and increased emergency room visits for tick-related bites.
Reports of a rare, severe tick-borne virus in the north-central Minnesota lakes region are sparking widespread concern.