Common
Powassan virus
Species of virus
Powassan virus
Powassan virus (POWV) is a tickborne flavivirus found naturally in North America and Russia. It is named after the town of Powassan, Ontario, where it was identified in a young boy after his death. It is known to cause encephalitis, and no human approved vaccine or antiviral drug exists. Prevention of tick bites is the best precaution.
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