Adaptive and Innate Immunity Discussion

What is the difference between adaptive and innate immunity? What is a cytokine? Mention examples of cytokines. Why are the skin and mucous membranes together called the body´s first line of defense? What is the difference between inherited and acquired immunity? What is the difference between natural and artificial immunity? What is the difference between active and passive immunity? Name four conditions that cause allostatic load. How does stress affect fetus?