NCI Dictionary of Cancer Terms

The NCI Dictionary of Cancer Terms features 8,545 terms related to cancer and medicine.

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nonavalent vaccine
(NOH-nuh-VAY-lent vak-SEEN)
A vaccine that works by stimulating an immune response against nine different antigens, such as nine different viruses or other microorganisms. For example, Gardasil 9 is a nonavalent vaccine that helps protect the body against infection with nine different types of human papillomaviruses (HPV).