Rabies is a viral disease that causes acute inflammation of the brain and is fatal without treatment. It is transmitted through bites from infected mammals. Early symptoms are similar to flu, but later symptoms include violent movements, hallucinations, and fear of water before death. Diagnosis involves testing tissues for viral proteins or DNA. Treatment requires thorough cleaning of wounds along with a series of vaccinations. Avoiding contact with wild animals and vaccinating pets can help prevent rabies. Immediate medical care is crucial for anyone exposed through a bite.