Explain, Antigen processing and Antigen presentation?

Antigen processing and antigen presentation are critical processes in the immune system that are responsible for initiating an immune response against foreign substances. Antigens are substances that are recognized by the immune system as foreign, such as pathogens or cancer cells, and trigger an immune response. In order for the immune system to recognize and respond to these antigens, they must first be processed and presented to immune cells in a specific way.

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