top of page

Haemophilus influenzae type b (Hib)

What is it?

Hib disease is caused by the bacterium Haemophilus influenzae type b (Hib).


Hib can cause a variety of serious complications including meningitis.

Most children who get Hib disease need to be hospitalized. Up to 20% of children who get Hib meningitis will have lasting brain damage or deafness.

Hib vaccines are very effective and provide >95% protection against infection with Hib.
Depending on which vaccine you get, it requires either 3 or 4 doses at 2 months, 4 months, 6 months (if 4 doses necessary), and 12-15 months.

What's the difference between them?

ActHIB, Hiberix, and PedvaxHIB vaccines specifically protect against Hib disease

Pentacel and Vaxelis are combination vaccines:

Pentacel contains ActHIB, but it also protects against polio and diphtheria, tetanus, and pertussis.

Vaxelis contains PedvaxHIB, but it also protects against polio, hepatitis B, and diphtheria, tetanus, and pertussis.

For more information about Hib vaccines, click here

Relevant Terms

  • Bacterium: The singular of bacteria (one bacterium, two bacteria)

  • Meningitis: inflammation of the lining of the brain and spinal cord

Anchor 1
bottom of page