Abstract
Biologic therapy poses a higher risk of viral infection for patients, however current knowledge of human polyomavirus infection in psoriasis patients is still limited. In this study, we evaluate the prevalence of BK polyomavirus (BKPyV), JC polyomavirus (JCPyV) and Merkel cell polyomavirus (MCPyV) in the group of psoriasis patients treated with biologics or topical therapy.