Since the beginning of March 2020 the evolving pandemic, resulting from the ‘escape’ of the virus known as Covid-19, has been hanging over our lives as a big dark cloud. It is threatening to burst at any moment and cause havoc to most aspects of human existence - social, cultural, political, economic and most of all being a threat to our physical and mental wellbeing. In order to understand why it has become necessary for governments to attack our hard won freedoms I have firstly tried to achieve an understanding of what constitute ‘viruses’. They are unlike any other natural beings, but if we are to fight them we have to achieve a degree of understanding of their traits and properties and their role in the natural world.