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This is a Haemophilus influenzae type B (Hib) vaccine.


Active ingredients:

A purified sugar from the capsule (outer layer) of the Haemophilus influenzae type B bacterium. This sugar is conjugated (attached) to tetanus toxoid (not toxin) in order to improve the immune response to the sugar

Inactive ingredients:
Amounts are based on a 0.5 mL dose

Carbohydrates: normally used as stabilizers in vaccines


Relevant Terms

  • Antibody: a protein made by the immune system in response to a foreign particle (antigen). These proteins circulate in the blood and help defend the body against the substance. 

  • Antigen: This is any substance that triggers the immune system to create antibodies. For example, allergens such as pollen are antigens.

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

  • Carbohydrates: another word for sugars

  • Conjugate: An antigen is attached to a protein in order to improve the protection the vaccine provides.

  • pH: a measure of how acidic or basic a solution is. The scale ranges from 0 (very acidic) to 14 (very basic). A pH of 7 is neutral.

  • Toxoid: an inactive version of a toxin produced by a bacterium. The body is able to make antitoxin without being exposed to the actual toxin. Toxoids are not toxic.

Relevant terms
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