text_1: One-year-old boy.  What is the difference between Hib (PRP-D) (Haemophilus influenza b conjugate vaccine (Diphtheria Protein Conjugate)) and Hib (PRP-OMP) (Haemophilus influenza b conjugate vaccine (Meningococcal Protein Conjugate)) and which one should I give?
text_2: What is the difference between Hib (PRP-D) (Haemophilus influenza b conjugate vaccine (Diphtheria Protein Conjugate)) and Hib (PRP-OMP) (Haemophilus influenza b conjugate vaccine (Meningococcal Protein Conjugate))?