Vaccine Design

When my interest was first drawn to the phenomenon of vaccination for virus diseases in the late 1930s, the state of the art and the science of vaccine design was not far advanced beyond the time of Jenner at the end of the 18th century and of Pasteur a century later. In the 1930s it was still believed that for the induction of immunity to a virus-caused disease the experience of infection was required, but not for a toxin-caused disease such as diphtheria or tetanus, for which a chemically deto