[Code of Federal Regulations] [Title 21, Volume 7] [Revised as of April 1, 2007] From the U.S. Government Printing Office via GPO Access [CITE: 21CFR610.11a] [Page 68] TITLE 21--FOOD AND DRUGS CHAPTER I--FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) PART 610_GENERAL BIOLOGICAL PRODUCTS STANDARDS--Table of Contents Subpart B_General Provisions Sec. 610.11a Inactivated influenza vaccine, general safety test. For inactivated influenza vaccine, the general safety test shall be conducted in the manner indicated in Sec. 610.11 of this chapter except that, with reference to guinea pigs, the test shall be satisfied if the product provides satisfactory results using either the subcutaneous or intraperitoneal injection of 5.0 milliliters of inactivated influenza vaccine into each guinea pig. The requirements for general safety for inactivated influenza vaccine shall not be considered to be satisfied unless each lot of influenza vaccine is assayed for endotoxin in comparison to a reference preparation provided by the Food and Drug Administration, and such lot is found to contain no more endotoxin than the reference preparation. [39 FR 40016, Nov. 13, 1974]