광견병, or rabies, is a viral disease that primarily affects mammals, including humans. It is caused by the rabies virus, which is usually transmitted through the bite of an infected animal, such as a dog or bat. Once symptoms appear, the disease is almost always fatal, making prevention through vaccination crucial. The virus attacks the central nervous system, leading to symptoms like fever, confusion, and paralysis. Infected individuals may also experience agitation and hallucinations. Vaccination for pets and prompt medical treatment after potential exposure are essential measures to control the spread of 광견병.