It explained the differences between natural and active acquired immunity as well as active and passive immunity. The last section focused on understanding inflammation, its pathophysiology, and the five cardinal signs of inflammation.

immune system — a complex network of cells, tissues, and organs that work together to defend the body against infections, diseases, and foreign substances. inflammatory response — the coordinated reaction of the immune system to injury, infection, or harmful stimuli, involving a series of cellular and biochemical processes aimed at eliminating the threat…. passive immunity — the temporary protection against a specific pathogen that is conferred to an individual by receiving pre-formed antibodies rather than producing them internally. biosimilar drugs — medications that are highly similar to an already approved biologic drug, known as the reference product.