Virus Clans : Virus Clans is the story of a research scientist on the verge of an extraordinary discovery: Certain viruses are no longer acting in a random way. In fact, they seem to be intelligently planning where and how to multiply. Yet intertwined in this powerful drama is the story of the virus clans themselves - spanning millions of years as they evolve and make their own extraordinary discovery. To be perfect hosts, human beings will have to change. . . .