Edward Jenner, an English country doctor, gave the first vaccination against smallpox.
Source
The US Women's Army Auxiliary Corps (WAAC) was formed.
Israel declared independence from the British administration.
The Netherlands Institute for War Documentation published Anne Frank's complete diary.
The USA's first space station, Skylab, was launched into Earth's orbit.
The Talyllyn Railway in Wales became the first railway line in the world to be run solely by volunteers.