A blue man shows up in a hospital emergency department, then a red woman, then a yellow one, and soon large numbers of people display a kaleidoscope of colors. A rogue biologist has exposed them surreptitiously to a genetically engineered virus that takes over the body’s melanocytes, producing the unnatural hues. Worse, the colors serve as a marker of the scientist’s intent to employ bioweapons to create worldwide mayhem. The FBI’s on the case, and so is the CDC. In his sci-fi novel, The Rainbow Virus, Dennis Meredith provides a behind-the-scenes look at forensic and epidemiological detective work.