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Start Over Formats Text ✖Remove constraint Formats: Text Collections Medicine in the Americas, 1610-1920 ✖Remove constraint Collections: Medicine in the Americas, 1610-1920 Subjects Pneumonia, Viral -- prevention & control ✖Remove constraint Subjects: Pneumonia, Viral -- prevention & control Subjects Vaccination ✖Remove constraint Subjects: Vaccination Subjects Influenza, Human -- prevention & control ✖Remove constraint Subjects: Influenza, Human -- prevention & control Titles Studies in influenza and pneumonia. IV, Further results of prophylactic inoculations ✖Remove constraint Titles: Studies in influenza and pneumonia. IV, Further results of prophylactic inoculations Genre Lectures ✖Remove constraint Genre: Lectures Copyright Public domain ✖Remove constraint Copyright: Public domain

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