Technician holding large guinea pig, animal testing
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Guinea pigs photographed in a UK animal research establishment in November 2007. Research on guinea pigs led to the discovery of vitamin C and the antibiotic streptomycin. Please acknowledge © Understanding Animal Research.
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Guinea pigs have made important contributions to medical advances. In the early part of the 20th century, they were instrumental in the development of a vaccine for diphtheria. They have been used in research to study mechanisms of the immune system, as well as the chemical structure of antibodies.
