If there is a high level of rabies virus antibodies in the body, rabies will not normally be contracted. If the level of rabies virus antibodies in the body is too low, it may lead to rabies infection. Usually rabies virus antibody is a kind of immunoglobulin produced under the action of rabies virus antigen, when this kind of immunoglobulin reaches a certain amount in the body, it can have the patient to avoid the infection of rabies virus after contacting with the rabies virus effectively. However, if the antibodies against rabies virus are low, the immunization effect is usually not effective after exposure to the virus, and there is a possibility of contracting rabies virus. If a patient is bitten or scratched by a canine, he or she must go to the hospital in time to receive rabies vaccine and immunoglobulin, which can effectively prevent infection.