CTK Biotech Achieves CE-IVDR Certification for OnSite® RSV Ag Rapid Test
August 29, 2025. Poway, California

CTK Biotech, part of SSI Diagnostica Group, achieves CE-IVDR approval for its OnSite® RSV Ag Rapid Test—advancing respiratory diagnostic leadership and global health impact.
SSI Diagnostica Group is proud to announce that CTK Biotech has obtained CE marking under the European In Vitro Diagnostic Regulation for its OnSite® RSV Ag Rapid Test.
This key regulatory milestone reinforces SSI Diagnostica Group’s commitment to delivering trusted, high-quality diagnostic solutions, designed to enable healthcare professionals prevent, monitor, and diagnose infectious diseases – effectively driving improved patient outcomes. Building on a respiratory legacy that dates back to the development of the world’s first pneumococcal vaccine, SSI Diagnostica Group continues to shape respiratory diagnostic solutions through scientific excellence.
The CE-IVDR approval of the OnSite® RSV Ag Rapid Test adds to a growing portfolio of IVDR approved products from SSI Diagnostica Group. We remain committed to bringing even more of our solutions up to the highest regulatory standards.
About the test
The OnSite® RSV Ag Rapid Test is a lateral flow chromatographic immunoassay that reliably detects RSV subtypes A and B, producing easy-to-read results in 15 minutes.
Demonstrating robust performance when evaluated for cross-reactivity with 30+ respiratory pathogens and disease states, as well as potential interference from common medications used to treat respiratory symptoms, the test provides clinicians with a critical tool for disease detection during seasonal outbreaks of respiratory infections, when disease differentiation is complicated by overlapping symptom presentation.
About SSI Diagnostica Group
SSI Diagnostica Group is a leading global developer and manufacturer of in vitro diagnostic solutions for infectious diseases focused on gastric, respiratory and bloodborne conditions. Founded as a division of the renowned Statens Serum Institut, our roots go back to 1902. SSI Diagnostica was privatized in 2016 and acquired San Diego-based CTK Biotech in 2020, followed by TechLab in 2022, and Gulf Coast Scientific in 2025. The CTK Biotech product portfolio leverages self-developed and proprietary recombinant antigen and antibody production to develop portable, intuitive diagnostic kits that are used globally, including in remote and resource-limited environments.
For all questions and media inquiries, please contact Mie Nete Petersen at:
Email – info@ssidiagnostica.com
Phone – (+45) 48 29 91 00










