5The therapeutic substances mentioned in paragraph 1(1)(a) above are—
(1)The substances commonly known as vaccines, sera, toxins, antitoxins and antigens.
(2)The substance commonly known as salvarsan (Dioxy-diamino-arseno-benzol-di-hydrochloride), and analogous substances used for the specific treatment of infective disease.
(3)Extract of the pituitary body.