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Target intelligence / Profile preview
Haemophilus influenzae type b polysaccharide-protein conjugate antigen (Hib conjugate antigen)
- Target
- Hib conjugate antigen
- Molecular classification
- Polysaccharide-protein conjugate, Vaccine antigen
01
Overview
The Haemophilus influenzae type b polysaccharide-protein conjugate antigen consists of size-defined fragments of Hib capsular PRP covalently linked to an immunogenic carrier protein. This design converts a weakly immunogenic bacterial sugar into a potent vaccine antigen capable of eliciting robust humoral immunity—including memory—in young children who are most at risk for severe disease due to Hib infection.
- Other names
- Hib vaccine antigenPRP-conjugate vaccinePolyribosylribitol phosphate conjugateActHIBPedvaxHIBHiberix
02
Mechanism of action
Elicits T-cell dependent B cell activation leading to production of anti-PRP IgG antibodies and immunological memory.
03
Biological functions
Induction of humoral immunityB cell activationT cell dependent immune responseAntibody productionImmunological memory
04
Disease associations
Prevention of Haemophilus influenzae type b infectionsPrevention of meningitisPrevention of epiglottitisPrevention of pneumoniaPrevention of septic arthritis
05
Safety considerations
Low reactogenicityRare adverse events (e.g., fever, local reactions)
06
Interacting drugs
None (as a direct drug interaction, it is an antigen)
1 more in the full profile.
07
Biomarkers
Anti-PRP IgG antibody titers
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