Biotechnology Swiss clinical-stage biotech AC Immune’s shares closed up 5.9% at $1.90 yesterday, after it announced additional interim safety and positive immunogenicity data from the Phase II VacSYn clinical trial evaluating ACI-7104.056, its wholly owned anti-alpha-synuclein (a-syn) active immunotherapy candidate, for the treatment of patients with early Parkinson’s disease (PD). 3 April 2025