More than 600 entries covering emerging diseases, treatments, research, vaccines and more. In the past 25 years, more than 30 new germs affecting humans have emerged onto the medical scene, most of them rising from animals. New diseases like the avian flu, Ebola, SARS, and weaponized viruses such as anthrax and smallpox pose a growing danger to the world.These are more than just definitions: discussions include risk factors, outlook, diagnostics, and the latest treatment options.