Could you briefly summarize the recommendations for PPSV23 vaccination of children?

All children 2-18 years who are at highest risk for serious pneumococcal infection (see categories 9 through 16 in related answer) should first be assessed and age-appropriately vaccinated with PCV13, if indicated. At least 8 weeks following completion of PCV13 vaccination, these children should get the first of 2 doses of PPSV23, spaced five years apart. Children with risk factors 1 through 8 above should get one dose of PPSV23.