curs in around 20% of paralytic epidemic patients. The cranial nerve nuclei are involved and weak pharynx and vocal cords results in inability to swallow or talk clearly. The automatic center of the medulla may be involved, including the respiratory center, resulting in rapid respiratory failure. Bulbospinal polio is a combination of bulbar and spinal paralysis.
Three different poliomyelitis viruses have been identified: Type I, Brunhilde; Type 2, Lansing; and Type 3, Leon. Numerous strains of the virus belong to one of these three types. Infection by one does not bring immunity to the others. Therefore, without vaccination, one could contract polio three times.
Polio Victims. Peg Kehret, a polio victim, provides an example of what typically happened with the contraction of this dreaded disease. A usual Friday school morning, brought an end to the life as it had been experienced thus far, for the author and her family. "As I sang, a section of my blue
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