Welcome Dear GEN Readers, Viral safety is a constant concern for all biopharmaceuticals as a contamination can cause significant regulatory concern and business disruption. A multilayered approach to virus safety across the full production landscape involves treating raw materials to prevent virus from entering the upstream process, testing intermediates to detect virus, and implementing purification and filtration technologies John Sterling Editor-in-Chief, GEN Darren Verlenden Vice President, Bioprocessing, MilliporeSigma to remove virus downstream. Recognizing there is no single solution that works for every process, experts from MilliporeSigma are hoping to stimulate discussion by highlighting different aspects of viral safety for well-established platforms and newer virus-based therapies. We hope you find these perspectives infomative and look forward to working with you to solve the Listen Now Listen Now toughest viral safety challenges.http://www.GENengnews.com http://www.MilliporeSigma.com