Subjects: Diphtheria -- epidemiology and Ontario -- epidemiology / Publication Year: 1940 - Digital Collections - National Library of Medicine Search Results

Start Over Subjects Diphtheria -- epidemiology ✖ Subjects Ontario -- epidemiology ✖ Publication Year 1940 ✖

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Publication:: [London] : Ministry of Health, Central Council for Health Education : Printed for H.M.S.O. by J. Weiner, [194-?]
Subject(s):: Diphtheria -- prevention & control
Diphtheria -- epidemiology
Mass Vaccination
Ontario -- epidemiology