Chairs: Maija Vihinen-Ranta, Salla Mattola VIRAL HIJACKING OF PIONEER ACTIVITY: UNVEILING A DEVELOPMENTAL TRANSCRIPTION FACTOR'S ROLE IN ONCOGENIC VIRAL INFECTION Päivi Ojala, University of Helsinki HERPES SIMPLEX VIRUS VECTOR EXPRESSING DECORIN DISPLAYS IMPROVED ONCOLYTIC EFFECT IN VITRO AND IN VIVO