Specificity tests and avidity tests.
21 C.F.R. § 660.26
in effectEffective: 2024-07-01Specificity and avidity tests shall be performed using test procedures approved by the Director, Center for Biologics Evaluation and Research.
Source: eCFRURL: https://www.ecfr.gov/api/versioner/v1/full/2024-07-01/title-21.xmlFetched: 7/26/2026
