pneumococcal vaccine

[ nōō′mə-kŏkəl ]

n.

A vaccine containing purified capsular polysaccharide antigen from the most common infectious types of Streptococcus pneumoniae, used to immunize against pneumonococcal disease.

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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.