As per health experts,pneumococcal conjugate vaccine should be given to adults who are 65 years or older and to young children who are below 2 years of age. You can read about the Zoonotic Diseases – Definition, Types, and how they spread in the given link.

Further readings:

1. Science & Technology Notes For UPSC – General Science Notes 
2. Science & Technology Questions in UPSC Mains GS-3