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A new reduced-dose tetanus–diphtheria (Td) vaccine was developed in Korea, and phase I and II clinical trials were successfully undertaken. We conducted this double-blind, randomized, multicenter phase III clinical trial to assess the immunogenicity and safety of the new Td vaccine.Healthy adolescents 11–12 years of age were enrolled and randomized to receive the new Td vaccine (study group) or a...
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