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Two different types of vaccines were developed against poliomyelitis: The Salk vaccine using inactivated virus and the Sabin one, that was used later, after investigations assured its safety. The first one was made in Mexico with its own resources since 1957 thanks to the efforts of young researchers and technicians coordinated by Luis Gutiérrez-Villegas, M.D., who was a Clinical Pathologist, University Professor and President of the Mexican National Academy of Mexico.

Un capítulo olvidado de la tecnología y la ciencia mexicanas: Luis Gutiérrez Villegas y la poliomielitis en México