Understanding white blood cell (WBC) functions in health is essential for recognizing how the body defends itself against infections. WBCs, including neutrophils, lymphocytes, monocytes, eosinophils, and basophils, each play a unique role in identifying and destroying harmful pathogens. They circulate in the blood and tissues, forming the immune system’s first and adaptive lines of defense. Maintaining balanced WBC levels supports immunity and overall health. Abnormal WBC counts may indicate infections, inflammation, or immune disorders. Healthcare providers, clinics, and even a ceftriaxone injection wholesaler emphasize the importance of WBC monitoring when treating bacterial infections to ensure effective immune response and recovery.