Active immunization against diphtheria : its effect on the distribution of antitoxic immunity and case and carrier infection / by Sheldon F. Dudley, Percival M. May and Joseph A. O'Flynn ; with a note by J. Orr Ewing.

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May, Percival M. (Percival Marshall), 1869-

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Active immunization against diphtheria : its effect on the distribution of antitoxic immunity and case and carrier infection / by Sheldon F. Dudley, Percival M. May and Joseph A. O'Flynn ; with a note by J. Orr Ewing.