Tick-Borne Illnesses on the Rise Across the U.S. Amid Warming Climate
Scientists are raising alarms about a potential surge in tick-borne illnesses across the United States as warmer weather and climate change create favorable conditions for tick populations. According to Nicole Baumgarth, a professor at Johns Hopkins Bloomberg School of Public Health, emergency room visits for tick bites in April 2026 were the highest recorded since 2017, except in the south-central U.S. Ticks, which thrive in warm and humid conditions, are expanding their range further north due to milder winters and climate change. The white-footed mouse, a key host for Lyme disease-carrying ticks, is also thriving, contributing to the problem. Tick-borne illnesses such as Lyme disease, Rocky Mountain spotted fever, and alpha-gal syndrome, which causes a red meat allergy, are becoming more prevalent. While a Lyme disease vaccine is under development, it is not yet available, leaving prevention as the primary defense against tick-borne diseases. 
