Arizona State University School of Life Sciences: Viral Attack

There are battles that are fought each day on the planet. The invading forces are those of viruses and bacteria. Left alone they would take over and destroy every cell! It is up to some key defense systems to battle and destroy these forces. Our immune system is one such defense system. A collection of special cells in our body are ready to attack any unwanted bacteria and virus. Together these cells are able to seek out and destroy unwanted viruses and return our bodies to their normal working order. Read about macrophages, B-cells, killer t-cells, helper T-cells and epithelial cells and learn how the human body fights off disease.