Viruses are the connecting link between Living & Non-Living organisms.These react as Non-Living in the Environment until it comes in contact of Living Cell.Viruses are different from other microbes in these ways : ...they can only reproduce when they attack any cell, unlike other microbes which can reproduce freely.
This makes them radically differentfrom any known organism. Viruses do, however, show some characteristics of living things. They are made of proteins and glycoproteins like cells are. They contain genetic information needed to produce more viruses in the form of DNA or RNA.