Rabies is a disease caused by a viral infection. For dogs or some animals that are infected, it is easy to develop some symptoms, and even the manic type of rabies may bite people. However, if the rabies virus infects humans and causes rabies to occur in humans, there is usually no bite. The most obvious symptom is the symptom of hydrophobia. When hearing the sound of water or when drinking water, the patient will have spasmodic symptoms such as fidgeting, even bawling, or manic symptoms. However, this condition does not disturb the nerves of the rabid person, and the patient is still relatively normal mentally. Therefore, families caring for rabies must be aware that rabies, although incurable, does not produce the symptoms of biting.