Cluster: A potentially fatal disease, a tantalizing romance and international terrorism converge with explosive consequences in this medical thriller

The investigation of a rare blood disease and the development of an unexpected romance come clashing into a sinister international plot. Dr. Dan Murphy is puzzled why his healthy 28 year old brother develops a rare blood disease. As part of an academic course in environmental medicine, he becomes acquainted with Anna Carlson, a young journalist pursuing a graduate degree in public health. With Anna's encouragement, they navigate environmental government agencies, while Anna conducts a resea...