Active Immunization

Abstract
THE continued extension of public-health and preventive medical activities, the need for new and massive immunization programs among the armed forces of the United States and other countries, and the corresponding impetus that the war gave to investigations concerning active immunization have in recent years produced an enormous mass of theoretical and experimental observations in this field.In this review no attempt is made to cover any branch except active immunization as it applies to diseases existing in New England for which such immunization is of practical interest — that is, diphtheria, scarlet fever, tetanus, pertussis, typhoid fever, smallpox, influenza . . .