THE IMPACT AND COST EFFECTIVENESS OF VACCINE PROGRAMS IN ELDERLY: UNDERSTANDING THE INTERACTION BETWEEN INFANT AND ELDERLY VACCINATION. Abstract Objectives In February 2012, the Advisory Committee on Immunization Practices (ACIP) advised that all adults aged ≥65 years receive a single dose of reduced-antigen-content tetanus, diphtheria, and acellular pertussis (Tdap), expanding …
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