Complete or near-complete absence of specific antibody response to protein-conjugated Haemophilus influenzae type b vaccine

What it means

The inability to synthesize postvaccination antibodies against a protein-conjugated Haemophilus influenzae type b (Hib) antigen, as measured by antibody titer determination following vaccination.

Rare diseases that can present with this1

The range is how often this sign appears among people diagnosed with each disease — it is not a probability of having any of them. Many of these signs also occur in common, non-rare conditions. A sign on this page is a conversation to have with a clinician, not a conclusion.

Part of the broader category