Vaccine Information. The pneumococcal conjugate vaccine, PCV13 or Prevnar 13®, is currently recommended for all children younger than 5 years old, all adults 65 years or older, and people 6 through 64 years old with certain medical conditions.t a Glance. Pneumococcal conjugate vaccine (PCV13) is recommended for all children younger than 5 years old, all adults 65 years or older, and people 6 years or older with certain risk factors.