Experts explain what viruses are

The video tutorial explains the structure of viruses, which consist of nucleic acids surrounded by a protein shell. It discusses the classification of viruses into RNA and DNA based types. Viruses are unique as they straddle the line between living and nonliving entities, only able to reproduce by infecting living cells. The human immune system combats viruses using B cells that produce antibodies and killer T cells that destroy infected cells. However, this immune response can also cause stress to the body.

What is the function of killer T cells in the immune system?

What is a consequence of the immune response attacking the body itself?