A test for previously acquired immunity to diphtheria, using an intradermal injection of diphtheria toxin.
- The Schick test, in which a tiny quantity of diphtheria toxin protein is injected into the skin of the forearm, can show whether an individual is immune to diphtheria.
- By 1921 Park and his colleagues had used the Schick test on more than 52,000 New York City schoolchildren.
Early 20th century: named after Bela Schick (1877–1967), Hungarian-born US pediatrician.
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