The Powassan virus polymerase chain reaction result may remain positive for a longer time in urine than in blood, serum, and cerebrospinal fluid (7 days or more).
Sterile vial/container
Sterile vial
Refrigerated (preferred) - 7 days
Frozen - 7 days
Heat-inactivated specimen
Real-Time Polymerase Chain Reaction (PCR)
Negative