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Polio Vaccine: Anniversary, 1955
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April 12th, 2023 This day in April marks the anniversary of announcement that the polio vaccine developed by American physician Dr. Jonas E. Salk was "safe", potent and effective". Incidence of infantile paralysis or poliomyelitis, declined by 95% following introduction of preventive vaccines. The first mass inoculations of children with the Salk vaccine had begun in Pittsburgh in 1954. Source: www.historyofvaccines.org/content/articles/history-polio-poliomyelitis 
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Additional April Events
National Orchid Day April 16th, 2023 
Adult Autism Awareness Day April 18th, 2023 |
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