HiB (Haemophilus Influenzae Type B ) - Haemophilus influenzae type b (Hib) is a bacterium that infects the lining of the brain, causing meningitis. Children with meningitis often have fever, stiff neck and drowsiness. Symptoms can progress to include coma and death. Some children recover from the disease but are left permanently paralyzed, deaf, blind or mentally impaired. Hib can also cause bloodstream infection (sepsis), pneumonia, cellulitis, arthritis and epiglottitis.