The FDA approved the first chickenpox vaccine.
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Saint Patrick was captured by Irish raiders from his home in Britain and taken to be a slave in Ireland.
The UK, the Netherlands, Belgium, Luxembourg, and France signed the Treaty of Brussels.
The quickest boxing match in history took place.
Albert Einstein wrote his first paper on the Quantum Theory of Light.
Researchers at the Lawrence Berkeley National Laboratory discover Californium, a new radioactive element.
