YearrooWhen was the polio vaccine declared safe and effective?
195520th century · 1900s
The polio vaccine is declared safe and effective.
Jonas Salk refused to patent it.
1955
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Around the same time
- When was the structure of DNA revealed as a double helix?1953
- When did Hillary and Tenzing first climb Mount Everest?1953
- When did the Supreme Court rule in Brown v. Board of Education?1954
- When did Disneyland open?1955
- When did Rosa Parks refuse to give up her bus seat?1955
- When did Elvis Presley record his first hit, 'Heartbreak Hotel'?1956
- When was the Interstate Highway System approved?1956
- When was bubble wrap invented?1957
Some events played out over months or years, so we use the year they are best known for. Spotted a mistake? Email [email protected].