"Twelve germy experiments inside!"--Jacket.

We're outnumbered! -- Bacteria : they're old and tough -- Viruses : the enemy that gets within -- Germs get around! -- Germs attack ; we fight back -- The immune system -- The history of germs & humans--pox, plagues, and little demons -- How were germs discovered? -- What's in a vaccination? -- Antibodies -- HIV and AIDS -- Keeping safe and germ free -- Germs : we love them ; we hate them.