White blood cells protect the body against infection. Types of white blood cells include neutrophils, banded neutrophils, lymphocytes, monocytes, and eosinophils.
Each type of white blood cell plays a different role in protecting the body. The numbers of each type of white blood cells give important information about the immune system. Too many or too few of the different types of white blood cells can be a sign of an infection, an allergic or toxic reaction to medicines or chemicals, and many conditions, such as leukemia.
Current as of: November 29, 2021
Author: Healthwise Staff Medical Review: E. Gregory Thompson MD - Internal Medicine Kathleen Romito MD - Family Medicine Adam Husney MD - Family Medicine Brian Leber MDCM, FRCPC - Hematology
Medical Review:E. Gregory Thompson MD - Internal Medicine & Kathleen Romito MD - Family Medicine & Adam Husney MD - Family Medicine & Brian Leber MDCM, FRCPC - Hematology