M Imaz Pérez

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The immunogenicity of oral diphtheria, pertussis, tetanus, (DPT) and polio vaccines was examined. Six hundred seventy-seven children (Group I) were given hepatitis B vaccine at 0, 2, and 6 months of age and the oral DPT-polio vaccines were administered at 2, 4 and 6 months of age. A control group of 731 children (Group II) received only oral DPT-polio(More)
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