Outbreak is a medical thriller written by Robin Cook and published in 1987 which deals with an outbreak of the deadly Ebola virus in the United States. Despite its name and very similar storyline, the book is not connected to the 1995 movie also called Outbreak. The book was made into a television movie in 1995 and released under the title Robin Cook's Virus, later renamed Formula for Death, starring Nicollette Sheridan and William Devane.