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An attempt has been made to evaluate diphtheria and tetanus antitoxin response to diphtheria and tetanus toxoid as pressently marketed in Korea. A total of 80 infants divided in two groups according to doses of vaccine, were studied One group of 30 infants (group I ) received 1, 2 or 3 doses of D. P. T. vaccine (0.3ml, each) at... |