Immunology Today

: As the body’s first line of defense, the Innate Immune System is non-specific and immediate. It includes physical barriers like the skin and mucous membranes, as well as specialized cells like neutrophils and macrophages that engulf and destroy invaders through a process called phagocytosis.

To function correctly, a healthy immune system must adhere to four essential principles: Immunology

: Retaining information from previous infections to prevent future illness. : As the body’s first line of defense,