The Deadly Air

The Deadly AirIts a Golden Age for the viruses that live with us. More of these single-minded microscopic barbarians than ever are on intimate terms with humans. Yet they remain largely a mystery at the fringe of life, parasites, neither plant nor animal, what some believe to be the original living organisms. They're so small that only in the past hundred years have we isolated them for study. No one has any idea how many there are, whether their numbers are growing, or how many would kill us in...