Vaccine estimation apparatus, France, 1880-1920
Hyacinthe Vincent (1862-1950), a French physician and bacteriologist, invented this apparatus to test the concentration of vaccines. The opaque appearance or turbidity of a vaccine of unknown concentration is compared with one of a known standard. A light is shone through the vaccines and the intensity of the light at the other end is a measure of concentration. It is important to know the concentration of a vaccine in order to determine which is most effective. The apparatus was used at the Collège de France in the department of epidemiology where Vincent was professor from 1925 to 1936.
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Glossary: vaccine estimation apparatus
A substance given to humans or animals to improve immunity from disease. A vaccine can sometimes contain a small amount of bacteria that is designed to stimulate the body's reaction to that particular disease. The first vaccine was developed in 1796 by Edward Jenner to prevent smallpox.
The study of epidemic disease, including its spread, causes and methods of control.