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Neutrophils

When there is an infection or another source of inflammation in the body, special chemicals alert mature neutrophils, which then leave the bone marrow and travel through the bloodstream to the site in need. Neutrophil blood levels increase naturally in response to infections, injuries, and other types of stress. They may decrease in response to severe or chronic infections, drug treatments, and genetic conditions. +++(Note Diagnostic use)+++
55–70 percent of all white blood cells in the bloodstream
Made in bone marrow. Each neutrophil lives less than a day.