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JAMA. 1918;70(4):227-228. doi:10.1001/jama.1918.26010040005008b.
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Occasional outbreaks of diphtheria in military camps, and the possibility of preventing them by utilizing the more recent advances in the prophylaxis against this disease, have caused us to apply the Schick test to the recruits for the National Army on their admission to Camp Upton, Yaphank, L. I. Over 2,500 men have thus far been tested. Owing, however, to the assignment of the recruits, within forty-eight hours, to different regiments scattered over the camp, it was found necessary to discontinue making the test at the time of the primary physical examination. The test will be applied later, when it can be more conveniently done, to all the members of each regiment.

During the past four years an increasing number of hospitals and various institutions have adopted the Schick test as a routine procedure for determining the susceptibility or immunity of children and adults to diphtheria. In children the test


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