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About Powassan | Powassan Virus | CDC - Centers for Disease Control and . . . Powassan virus is spread to people by the bite of an infected tick Powassan virus disease is rare but is increasing Initial symptoms include fever, headache, vomiting, and weakness There are no vaccines to prevent or medicines to treat Powassan virus disease Reduce your risk by avoiding ticks
Powassan: Causes and How It Spreads | Powassan Virus | CDC Powassan virus disease (Powassan) is caused by a virus primarily spread to people through the bite of infected ticks Powassan is maintained in the environment between ticks and animals People do not spread the infection except in rare cases through blood transfusions
Clinical Signs and Symptoms of Powassan Virus Disease The incubation period for Powassan virus disease ranges from 1–5 weeks Initial symptoms can include fever, headache, vomiting, and generalized weakness The disease can progress to encephalitis, meningoencephalitis, or aseptic meningitis
Treatment and Prevention of Powassan Virus Disease People who are immunocompromised have a higher risk of getting seriously ill and dying from viruses spread by mosquitoes and ticks, including Powassan virus This includes people who are receiving immunosuppressive medications or treatments
Clinical Testing and Diagnosis for Powassan Virus Disease Serologic testing is the primary method for diagnosing Powassan virus infection A positive Powassan virus-specific immunoglobulin (Ig) M test result should be confirmed by neutralizing antibody testing at a state public health laboratory or CDC
Historic Data (2004-2024) | Powassan Virus | CDC Powassan Virus Powassan virus is primarily spread by ticks Learn about areas at risk, the illness it causes, and ways to prevent becoming infected View All