A 1-year-old boy is brought to the physician for a well-child examination. He recently immigrated to the US from China 2 months ago. The physician is considering administering a vaccine that has been converted from a T-independent antigen to a T-dependent one. Which of the following vaccines is the physician most likely considering?
Bordetella pertussis
Clostridium tetani
Corynebacterium diphtheriae
Haemophilus influenzae type B
Hepatitis B
Rotavirus
