At what age should the DPT vaccine be repeated?

The correct answer is the timeframe of 6, 10, and 14 weeks. The DPT vaccine, which protects against diphtheria, pertussis (whooping cough), and tetanus, is typically administered in a series during early childhood. This vaccine is part of the primary immunization schedule.

The recommended schedule includes doses at 2 months, 4 months, and the third dose at 6 months, followed by booster doses later in childhood, usually around 15-18 months and again at 4-6 years. Thus, the series initiates at 6 weeks of age, with follow-up doses occurring at regular intervals to ensure adequate immunity.

For the other options, while some provide plausible ages for childhood vaccinations, they do not align with the standard immunization schedule for the DPT vaccine. The 12-month mark is more associated with different vaccinations, such as the MMR (measles, mumps, and rubella). The 9-month option does not correspond to the DPT schedule, and 18 months is typically the time for a booster rather than the initial doses.