Plague ship : a novel of the Oregon files by Clive Cussler

"In the dependably entertaining if less than top-notch fifth Oregon Files thriller from bestseller Cussler and Du Brul (after Skeleton Crew), Capt. Juan Cabrillo, who heads the Corporation, a covert military company for hire, and the multifaceted crew of the Oregon, a high-tech ship disguised to look like a tramp steamer, take on a group known as the Responsivists. The Responsivists publicly espouse a program of global population control, but are secretly planning a devastating attack on the human race utilizing a virulent virus found aboard an ancient ship that may be Noah's Ark..." - Publishers Weekly