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NC Department of Health and Human Services
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North Carolina Immunization Branch

Vaccine Preventable Diseases

Haemophilus influenzae type B (Hib)

The Disease

Hib disease is severe bacterial infection, occurring primarily in infants and children under 5 years of age. It is caused by a bacterium, Haemophilus influenzae. There are six different types of these bacteria (a through f). Type b organisms account for 95 percent of all strains that cause invasive disease, and this is the type against which the Hib vaccine protects.  Hib disease can be very serious. The most common type of invasive Hib disease is meningitis.

The Vaccine

Hib vaccine prevents meningitis (an infection of the covering of the brain and spinal cord), pneumonia (lung infection), epiglottitis (a severe throat infection), and other serious infections caused by a type of bacteria called Haemophilus influenzae type b.

Who Should get Vaccinated?

All children under 5 years old should receive three to four doses of Hib vaccine.  One dose should be given at the following ages: 2 months, 4 months, 6 months, and 15 to 18 months.  The Hib vaccine can be safely combined with other vaccines.  

North Carolina Requirements

Children in North Carolina are required to receive three to four doses of Hib vaccine. 

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