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Common sites of amputation. (A) Upper extremities. (B) Lower extremities. The surgeon determines th
Diphtheria. The bacteria that cause this disease, called Corynebacterium diphtheriae, proliferate in
Photograph of the flea that transmits Yersinia pestis to cause bubonic plague, called the oriental r
The approval of a new drug is a four-stage process: (1) preclinical investigation, (2) clinical inve
In 1839 Mary Cragin, at the age of twenty-nine, became a convert to John Humphrey Noyes’s “communism
Rubella rash in a young child. Rubella is also called 3-day measles or German measles.