((a)) ** Law determinative of exemption** Meats and meat food products shall be exempt from the provisions of this chapter to the extent of the application or the extension thereto of the Meat Inspection Act, approved , as amended [ et seq.].21 U.S.C. 601March 4, 19071907-03-04

((b)) ** Laws unaffected** Nothing contained in this chapter shall be construed as in any way affecting, modifying, repealing, or superseding the provisions of section 351 of Public Health Service Act [] (relating to viruses, serums, toxins, and analogous products applicable to man); the virus, serum, toxin, and analogous products provisions, applicable to domestic animals, of the Act of Congress approved () [ et seq.]; the Filled Cheese Act of (U.S.C., 1934 ed., title 26, ch. 10), the Filled Milk Act of [ et seq.]; or the Import Milk Act of [ et seq.].42 U.S.C. 26237 Stat. 832–83321 U.S.C. 15121 U.S.C. 6121 U.S.C. 141March 4, 19131913-03-04June 6, 18961896-06-06March 4, 19231923-03-04February 15, 19271927-02-15