- a vaccine against meningitis, pneumonia, and other illnesses caused by the bacterium Haemophilus influenzae type b: usually administered during infancy.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- A vaccine administered to immunize young children against the bacterium Haemophilus influenzae type b, which causes meningitis, pneumonia, and other infections.
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