September 18, 2020

Lyme Disease Vaccine for Humans: Would You Trust It Today? Last reviewed: March 2026 | Daniel Cameron, MD, MPH A Lyme disease vaccine for humans once existed in the United States—but it disappeared from the market only a few years after approval. Lyme disease is transmitted through the bite of infected ticks carrying the bacterium […]

Ticks must balance their need to find a host with the risk of drying out while waiting in the environment. This behavior, known as questing, occurs when a tick climbs vegetation and waits for a passing host to brush against it. Questing is the behavior ticks use to locate hosts. A tick climbs onto grass