Microbiology Lecture 10-17-19 The search for viruses, Louis Pasteur postulated that rabies was caused by a “living thing” smaller than bacteria(1884), he developed the first vaccine for rabies. Ivanovski and Beijerinkck showed a disease in tobacco was caused by a virus (1890s). 1950’s virology was multifaceted discipline, viruses are non-cellular particles with a defintie size, […]