Affinity Biologicals manufactures products for thrombosis and hemostasis research and diagnostics. Their offerings include antibodies, ELISA kits, deficient plasmas, and custom services such as assay development and protein purification. With an ISO 13485 registered Quality System, they produce FDA- and Health Canada-licensed medical devices. In 2018, Affinity was acquired by Precision BioLogic, a leading developer of hemostasis diagnostic products.