{"id":4853,"canonical_url":"https://www.kudos365.com/today-in-history/events/1954ce-apr-26--4853","name":"1954 CE, April 26","year":1954,"era":"CE","month":4,"day":26,"url":"https://www.kudos365.com/today-in-history/events/1954ce-apr-26--4853","iso-date":"1954-04-26","precision":"year-month-day","description":"\u003cp\u003eLarge field trials for the Jonas Salk-developed polio vaccine began on April 26, 1954, at Franklin Sherman Elementary School in McLean, Virginia. The trials involved 1.8 million children, who became known as the \"Polio Pioneers.\" Almost a year later on April 12. 1955, the trial was deemed safe and effective, leading to a drastic reduction of polio cases in the US in a few years.\u003c/p\u003e","additional_details":"","photo":"","created_at":"2026-04-26T23:27:47-07:00","updated_at":"2026-04-26T23:29:05-07:00","breadcrumbs":{"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"April History","item":"https://www.kudos365.com/today-in-history/april"},{"@type":"ListItem","position":2,"name":"April 26","item":"https://www.kudos365.com/today-in-history/april-26"}]},"schema":{"@context":"https://schema.org","@type":"Thing","@id":"https://www.kudos365.com/today-in-history/events/1954ce-apr-26--4853#eventK365","name":"1954 CE, April 26","headline":"Large field trials for the Jonas Salk-developed polio vaccine began on April 26, 1954, at Franklin Sherman... - 1954 CE","description":"Large field trials for the Jonas Salk-developed polio vaccine began on April 26, 1954, at Franklin Sherman Elementary School in McLean, Virginia. The trials...","url":"https://www.kudos365.com/today-in-history/events/1954ce-apr-26--4853","additionalType":"HistoricalEvent","inLanguage":"en","datePublished":"2026-04-26T23:27:47-07:00","dateModified":"2026-04-26T23:29:05-07:00","publisher":{"@id":"https://www.kudos365.com/#organizationK365"},"temporalCoverage":"1954-04-26","isPartOf":[{"@id":"https://www.kudos365.com/#websiteK365"},{"@type":"CollectionPage","@id":"https://www.kudos365.com/today-in-history/april","name":"What Happened in April History"},{"@type":"CollectionPage","@id":"https://www.kudos365.com/today-in-history/april-26#pageK365","name":"What Happened on April 26"}]}}