What is the annual incidence of Haemophilus influenzae type b (Hib) meningitis in unimmunized populations?

Updated: Jul 09, 2018
  • Author: Prateek Lohia, MD, MHA; Chief Editor: Niranjan N Singh, MBBS, MD, DM, FAHS, FAANEM  more...
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Before effective immunizations, the world experienced as many as 2.2 million cases of Hib disease and 300,000-400,000 deaths each year as consequences of Hib infection. In unimmunized populations, Hib has been the most important cause of meningitis in children younger than 5 years, with estimated incidence rates in various nations ranging from 0.9-94.6 cases per 100,000 per year. [2]

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