White blood cells (WBCs) are a critical component of the immune system, protecting the body against infections, bacteria, viruses, and other foreign invaders. They identify threats, produce antibodies, and help coordinate immune responses to maintain internal balance. Abnormal WBC levels can signal infections, inflammation, immune disorders, or bone marrow problems, making them an important marker of overall health. In clinical care, effective antibiotics are often required to support immune defenses during severe infections, increasing demand for treatments such as ceftriaxone injection wholesale in healthcare supply chains. Maintaining healthy nutrition, sleep, and stress management helps support optimal white blood cell function.