Biological weapons are extremely dangerous, but militaries around the world are developing various methods to counteract these weapons, including vaccines and ways to clean areas affected by biological warfare. Readers explore the development of both biological weapons and the defenses against them. Accessible text and fact boxes clearly explain the history of these weapons, as well as the science and technology used to produce these weapons and to counteract them. Real-world examples of these weapons and the countermeasures used against them are included to give readers insight into a topic that's often in the news.