Context

Context of Wooden box that once contained Diphtheria Toxin supplied to doctors by the Division of Laboratories and Research, N.Y. State Department of Health. The Diphtheria Toxin was used for the "Schick Test" to assess an individual's level of resistance to Diphtheria. The test is a simple procedure. A small amount (0.1 ml) of diluted (1/50 MLD) diphtheria toxin is injected intradermally into the arm of the person. If a person does not have enough antibodies to fight it off, the skin around the injection will become red and swollen, indicating a positive result. This swelling disappears after a few days. If the person has an immunity, then little or no swelling and redness will occur, indicating a negative result
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