Among pneumococcal vaccines, which is used primarily for older children over age 2 years who are at higher risk of pneumococcal disease?

Among pneumococcal vaccines, which is used primarily for older children over age 2 years who are at higher risk of pneumococcal disease?

• A. PCV7
• B. PCV13
• C. PCV23
• D. PCV33

Answer: (C)

The key idea is choosing the vaccine that gives the broadest protection for older children at higher risk. The 23-valent polysaccharide vaccine covers more pneumococcal serotypes (23) than the conjugate vaccines, so it provides broader protection for kids over 2 years who have risk factors for pneumococcal disease. Conjugate vaccines like the 13-valent one are extremely effective in younger children and establish good immune memory, but they cover fewer serotypes. The older 7-valent option is outdated, and a 33-valent vaccine isn’t part of current practice. So for older children with higher risk, the broader coverage of the 23-valent vaccine makes it the best choice.

The key idea is choosing the vaccine that gives the broadest protection for older children at higher risk. The 23-valent polysaccharide vaccine covers more pneumococcal serotypes (23) than the conjugate vaccines, so it provides broader protection for kids over 2 years who have risk factors for pneumococcal disease. Conjugate vaccines like the 13-valent one are extremely effective in younger children and establish good immune memory, but they cover fewer serotypes. The older 7-valent option is outdated, and a 33-valent vaccine isn’t part of current practice. So for older children with higher risk, the broader coverage of the 23-valent vaccine makes it the best choice.