| a vaccine against meningitis, pneumonia, and other illnesses caused by the bacterium Haemophilus influenzae type b: usually administered during infancy. |
Hib vaccine  (hĭb) n. A conjugate vaccine administered to immunize children against infection by a rod-shaped, gram-negative bacterium, Haemophilus influenzae type b, which can cause bacterial meningitis and pneumonia. |
| Hib vaccine (hĭb) Pronunciation Key
A vaccine administered to immunize young children against the bacterium Haemophilus influenzae type b, which causes meningitis, pneumonia, and other infections. |