US lawFederal (United States)RegulationsTitle 21 CFR — Food and DrugsChapter I — FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICESPart 640 — ADDITIONAL STANDARDS FOR HUMAN BLOOD AND BLOOD PRODUCTSSubpart G — Source Plasma640.6721 C.F.R. § 640.67Laboratory tests.Last amended: 2016Year: 2026Length: 40 wordsOfficial source Cite as 21 C.F.R. § 640.67 (2026)Each unit of Source Plasma shall be tested for evidence of infection due to relevant transfusion-transmitted infections as required under § 610.40 of this chapter. [66 FR 31165, June 11, 2001, as amended at 80 FR 29905, May 22, 2015]Cross-references to the CFR610.40Previous21 C.F.R. § 640.66Next21 C.F.R. § 640.68