Patients with rabies do not learn to bark like dogs. When a patient is bitten or scratched by an animal such as a cat, dog or raccoon infected with the rabies virus, rabies is likely to be caused if the patient does not go to the hospital in a timely manner to clean the wound, drain the dirty blood and receive rabies vaccination. Although patients will not appear to learn to bark, they will usually show the following: 1. Incubation period: The length of the incubation period varies from person to person depending on the patient’s bite site, severity, and their own immunity, etc. The average is 20-90 days, with a minimum of 3 days and a maximum of more than 10 years, during which time there can be no symptoms; 2. Prodromal period: Generally 2-4 days, mainly manifested by low-grade fever, headache, fatigue, fear irritability or general discomfort, sensitive to sound, light, wind and other environmental stimuli, manifesting as throat tightness and pressure, which may cause shortness of breath, suffocation and other symptoms. In the process of wound healing, the wound site as well as the innervation area will be painful, itchy, numb or antsy; 3, excitement period: generally 1-3 days, mainly manifested as high excitement, the body temperature may rise to 38 ℃ -40 ℃. Some patients are afraid of water, extremely thirsty but afraid to drink water, hearing the sound of water, seeing water, drinking water or even mentioning water in speech will cause severe spasms of throat muscles. External stimuli such as wind, light and sound can also cause spasms of the throat muscles, which can lead to hoarseness, slurred speech, difficulty in breathing and swallowing, and excessive salivation, which can be manifested as “foam mouth”. In addition, the patient may show cyanosis, sweating, elevated blood pressure, hallucinations, mental disorders and other neurological symptoms; 4, paralysis phase: the patient’s muscle spasm disappears, showing general paralysis, and enters a deep coma, often leading to death by asphyxiation due to respiratory muscle paralysis.