What is making me sick and why? The answer: groups of micro-organisms which are called “viruses.” They make you sick when they enter your body, take control of your cells and then they inject their DNA (which makes us sick) into your cells. Viruses cause the flu, the common cold and many other illnesses. They are fascinating because they cause a lot of sicknesses and they are so very small. As a result, I, Benjamin Lewis, will tell you the truth, the whole truth, and nothing but the truth about viruses, where they come from, and what they can do to you. My experiment will show you what viruses and bacteria look like and where they are in your environment.