Edward Jenner, an English country doctor, gave the first vaccination against smallpox.
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Underground America Day was first observed, which recognizes the approximately 6,000 people who live in some form of underground architecture across North America.
Delegates started to gather in Philadelphia to draw up the US constitution.
The Netherlands Institute for War Documentation published Anne Frank's complete diary.
Settlers funded by the Virginia Company of London established Jamestown.
Dan Brown released his fourth novel in the Da Vinci Code series, Inferno, which became an instant success.
