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In The Journal, November 20, page 1684, in the first column, second line, following the word "negative," the following sentence should have appeared in the discussion by Dr. M. Bernard Brahdy of the paper by Dr. William H. Park: "For the results with precipitated toxoid I am going to present data obtained by Dr. O'Brien in a group of infants who had no previous injection of antigen."
Duration of Immunity Against Diphtheria. JAMA. 1937;109(24):1997. doi:10.1001/jama.1937.02780500053021