公公 Haemophilus influenzae a Small GN, pleomorphic coccobac 2 H flu type B causes almost ALL invasive disease a Nontypeable Hib can rarely cause meningitis. 7 Incidence of hib decreased by 97% after vaccineHaemophilus influenzae  Small GN, pleomorphic, coccobacilli  H. flu type B causes almost ALL invasive disease  Nontypeable Hib can rarely cause meningitis.  Incidence of Hib decreased by 97% after vaccine