Rabies can be detected by testing the patient’s saliva or by taking the patient’s cerebrospinal fluid for rabies virus antigen. If the test is positive, the patient is infected with the rabies virus, but it is usually the patient’s signs and symptoms that determine whether he or she is infected. Usually after being infected, the rabies virus has an incubation period of 1-3 months. During the incubation period, because the rabies virus is a neurotoxin, it slowly paralyzes the skin and muscles around the infected area and gradually moves up the entire torso to the central nervous system. The person will exhibit rapid heart rate, fever, irritability, mania, excitement, weakness, fear of water and even salivation, excessive sweating, and finally generalized paralysis, coma, and even respiratory failure. There is also a way to observe the presence of rabies by isolating the dog or cat that injured the person, and if the animal survives for more than 10 days, rabies can be ruled out.