White blood cells (WBCs) are the body’s primary defense against infections. They identify, attack, and destroy harmful pathogens such as bacteria, viruses, and fungi. Neutrophils quickly target invading microbes, while lymphocytes like T-cells and B-cells provide long-term immunity by producing antibodies. Monocytes and macrophages engulf and digest foreign invaders through phagocytosis. This coordinated immune response ensures infections are controlled and eliminated effectively. In severe bacterial infections, antibiotics such as ceftriaxone may be prescribed to support the immune system. Reliable ceftriaxone injection distributors ensure hospitals and pharmacies have access to this life-saving medication when patients need it most.