Biosafety classification is based on U.S. Public Health Service Guidelines, it is the responsibility of the customer to ensure that their facilities comply with biosafety regulations for their own country.
Walker SJ, et al. Powassan virus: investigations of possible natural cycles of infection. J. Infect. Dis. 109: 19-23, 1961. PubMed: 13774094
McLean DM, Larke RP. Powassan and Silverwater viruses: ecology of two Ontario arboviruses. Can. Med. Assoc. J. 88: 182, 1963.
