Microbiology Conjugate vaccines are available for the prevention of invasive disease caused by all of the following except – A H influenzae B Strep pneumoniae C N. meningitidis (group C) D N. meningitidis (group B) 💡 Explanation Conjugate vaccines are available for the prevention of invasive disease caused by all of the following except - ✓ Correct Answer: D. N. meningitidis (group B)