Assertion: tetanus's vaccine | /r/HasProperty | 6 months
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text: In the U.S., health officials recommend active immunization of infants and children with DTaP -- diphtheria, tetanus, and acellular pertussis (whooping cough) -- vaccine at the ages of 2 months, 4 months, 6 months, 15 to 18 months, and again between the ages of 4 and 6.