The smallpox vaccine was the first vaccine to be developed against a contagious disease. In 1796, the British doctor Edward Jenner demonstrated that an infection with the relatively mild cowpox virus conferred immunity against the deadly smallpox virus. Cowpox served as a natural vaccine until the modern smallpox vaccine emerged in the 20th century. From 1958 to 1977, the World Health Organization conducted a global vaccination campaign that eradicated smallpox, making it the only human disease to be eradicated. Although routine smallpox vaccination is no longer performed on the general public, the vaccine is still being produced to guard against bioterrorism, biological warfare, and for monkeypox.
invented by Eli Whitney
A cotton gin – meaning “cotton engine” – is a machine that…
invented by Joseph Bramah
A hydraulic press is a machine press using a hydraulic cylinder to generate a…
invented by William Cullen
The term refrigeration means cooling a space, substance or system to lower…
invented by Jesse Ramsden
A screw-cutting lathe is a machine (specifically, a lathe) capable of cutting…
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