White blood cells (WBCs) protect against infections by identifying, attacking, and destroying harmful pathogens like bacteria, viruses, and fungi. They act as the immune system's defense team, using various strategies such as engulfing invaders (phagocytosis), producing antibodies, and releasing chemicals to neutralize threats. Different types of WBCs perform specialized roles in fighting infections and promoting healing. In severe bacterial infections, antibiotics like ceftriaxone injection may be prescribed to assist WBCs by directly killing bacteria. Hospitals and pharmacies often purchase ceftriaxone injection wholesale to ensure cost-effective, bulk availability for treating infections efficiently and supporting the body’s immune response.