How many doses does the DTaP vaccine consist of?

The DTaP vaccine, which protects against diphtheria, tetanus, and pertussis (whooping cough), is typically administered in a series of five doses. This schedule is designed to provide optimal immunity throughout early childhood and is usually given according to the following timeline: the first dose is administered at 2 months of age, followed by additional doses at 4 months, 6 months, 15-18 months, and finally between 4-6 years of age.

Each dose in the series is important for building and maintaining immunity against these potentially serious diseases, as immunity from vaccines can diminish over time. By completing all five doses, children ensure that they receive the full benefit of protection the vaccine can provide. Therefore, the correct answer reflects the recommended vaccine schedule established by health authorities.