French researchers track rare Tick-Borne infections as climate change expands risk zones

This study looks back at cases of recurrent borreliosis, a bacterial infection spread by ticks or lice, diagnosed in France between 2013 and 2025. Researchers will describe the symptoms, where patients got infected, which Borrelia species caused the illness, and how it was diagnosed and treated. The goal is to better understand this rare but serious disease, which can be fatal in 5-10% of cases.