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a '''macrophage''' is a large cell that helps the body defend itself against [[disease]] by surrounding and destroying foreign organisms ([[viruses]] or [[bacteria]]).<ref>http://www.cdc.gov/vaccines/about/terms/glossary.htm#m</ref>

A '''macrophage''' is a large cell that helps the body defend itself against [[disease]] by surrounding and destroying foreign organisms ([[viruses]] or [[bacteria]]).<ref>http://www.cdc.gov/vaccines/about/terms/glossary.htm#m</ref>

Macrophage is a type of white blood cell that surrounds and kills microorganisms, removes dead cells, and stimulates the action of other immune system cells.

Macrophage is a type of white blood cell that surrounds and kills microorganisms, removes dead cells, and stimulates the action of other immune system cells.