A 2-month-old was mistakenly given PPSV23. What should be done?

Pneumococcal polysaccharide vaccine (PPSV23, Pneumovax, Merck) is not licensed or assumed to be effective in children younger than 24 months of age. PPSV23 given at this age should not be counted as part of the pneumococcal vaccination series. Pneumococcal conjugate vaccine should be administered as soon as the error is discovered. Any time the wrong vaccine is given, the parent/patient should be notified.