Interferons are referred to as antiviral proteins. What stimulates their production, and how do they protect uninfected cells? Which cells of the body secrete interferons? What is complement? How does...

Interferons are referred to as antiviral proteins. What stimulates their production, and how do they protect uninfected cells? Which cells of the body secrete interferons?

What is complement? How does it cause bacterial lysis? What are some of the other roles of complement?

Although the adaptive immune system has two arms, it has been said, “no T cells, no immunity.” Explain.