Rare Tick-Borne Illness Spreading Across the U.S.
A rare and potentially deadly tick-borne illness is currently on the rise in the United States, with roots tracing back to a case from 1958 involving a young boy. The disease, known as the Powassan virus, got its name from a town in Ontario where it was first identified.
Lincoln Byers, a 4-year-old boy from Canada, sadly lost his life due to an unexplained illness. Years later, researchers found a tick carrying the Powassan virus on a deceased squirrel, shedding light on Lincoln’s case and highlighting a looming public health concern.
Once seen as a rare occurrence, cases of the Powassan virus have surged in America. The Centers for Disease Control and Prevention (CDC) reports that in 2025, 76 people were diagnosed with the virus, the highest number recorded, compared to an average of just seven to eight cases annually in the past.
Transmission and Risks
The Powassan virus spreads primarily through the bites of infected woodchuck or deer ticks. The virus is most commonly found from late spring to mid-fall, coinciding with peak tick activity and increased outdoor activities.
Public health experts warn about the speed at which the virus can spread. “One of the most dangerous aspects is its rapid transmission,” said Dr. Jorge P. Parada, a medical advisor. Unlike Lyme disease, which usually requires a tick to stay attached for 36 to 48 hours for transmission, the Powassan virus can be passed on in just 15 minutes.
Symptoms and Severity
While cases of Powassan are still rare when compared to Lyme disease, health experts consider it a concerning threat. Dr. Marc Siegel emphasized that once contracted, there is an incubation period of one to four weeks before symptoms appear. Early signs include fever, headache, vomiting, and weakness; however, some people may not show any symptoms at all.
The virus can lead to severe neurological complications, such as encephalitis (inflammation of the brain) and meningitis (inflammation of the membranes around the spinal cord). Severe cases could result in confusion, coordination issues, difficulty speaking, and seizures. About 10% of severe cases can be fatal, and many survivors may face long-term neurological problems.
Current Treatment and Prevention
As of now, there are no specific treatments or vaccines to combat the Powassan virus. Supportive care, such as intravenous fluids and respiratory assistance, is the primary approach for managing the illness. Although anyone can become seriously ill from this virus, children, older adults, and individuals with weakened immune systems are at higher risk.
Health experts continue to raise awareness about the Powassan virus as cases increase and more people venture outdoors during peak tick season.
