VICH GL41 Target animal safety: examination of live veterinary vaccines in target animals for absence of reversion to virulence - Scientific guideline
VeterinaryScientific guidelines
On Monday, 12 January 2026, between 07:00 and 10:00 CET (Amsterdam time), this website will be unavailable due to scheduled maintenance.
This document establishes agreed criteria and requirements for the conduct of studies that examine the potential for reversion to or increase in virulence of live veterinary vaccines in target animals.
Keywords: VICH, target animal safety, live veterinary vaccines, reversion, virulence