In "The Hate Disease" by Murray Leinster, the author delivers a chilling and thought-provoking exploration of the potential consequences of biological warfare. Through vivid descriptions and engaging storytelling, Leinster effectively conveys the horror and devastation that can result from the spread of a contagious disease designed to amplify feelings of hatred and violence. The characters are well-developed and their struggles feel real and poignant. As the society collapses under the weight of fear and paranoia, the narrative becomes increasingly tense and gripping. Overall, "The Hate Disease" is a compelling and cautionary tale that will linger in the minds of readers long after they have finished the book.

Book Description:
Dr. Calhoun and his pet tormal Murgatroyd work for the Interstellar Medical Service making routine public health inspections on far-flung colonial planets. When they reach Tallien Three they are greeted with a rocket attack by the Paras, a mutated form of human rapidly replacing the “normals”. The normals think it’s a pandemic of demonic possession but Calhoun has his doubts. If he can keep from turning into a Para, or being assassinated by them he just might figure this thing out. – The Hate Disease was first published in the August 1963 edition of Analog Science Fact and Fiction magazine.