Pioneering French microbiologist and chemist (1822–1895) who demonstrated the germ theory of disease and developed the first vaccine against rabies. ANS in French, signed “L. Pasteur,” on his personal engraved 3.5 x 2 Academie Française card, no date. Pasteur sends thanks and friendly greetings. Subtle uniform toning, otherwise very fine, clean condition. R&R COA.