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Haemophilus influenzae Disease (Including Hib)

Haemophilus influenzae (including Hib) is a bacterium that can cause a severe infection, occurring mostly in infants and children younger than five years of age. It can cause lifelong disability and be deadly. In spite of its name, Haemophilus influenzae bacteria do not cause influenza (the "flu").

There are six identifiable types of Haemophilus influenzae bacteria (a through f) and other non-identifiable types (called nontypeable). The one most people are familiar with is Haemophilus influenzae type b, or Hib. There's a vaccine that can prevent disease caused by Hib, but not the other types of Haemophilus influenzae bacteria.

Haemophilus influenzae Disease (Including Hib) Topics

Mother comforting her child.
About Haemophilus influenzae Disease

Types of Haemophilus influenzae infection, signs & symptoms, transmission, photos of Haemophilus influenzae b (Hib), complications, treatment...

Boy getting vaccinated

Invasive Haemophilus influenzae disease is tracked by two surveillance systems...

Baby receiving a vaccination.

General information about the Hib vaccine, what you need to know about the Hib vaccine, vaccination coverage...

For Laboratorians

Overview of CDC Meningitis Laboratory, which is responsible for Haemophilus influenzae bacteria...

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Publications & Multimedia

Chapters and articles about epidemiology, vaccines, surveillance, outbreaks and lab research for Haemophilus influenzae bacteria...


Girl sneezing.

Haemophilus influenzae bacteria, including Hib, are spread person-to-person by direct contact or through respiratory droplets like coughing and sneezing.



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