Antibodies for rabies generally last for a relatively long time. According to the 2016 rabies prevention guidelines, if the rabies vaccine is administered systematically and sufficient levels of rabies antibodies are produced, then three to five years later, the vast majority of people can still detect effective levels of rabies antibodies. Nowadays, the detection of rabies antibodies is also quite convenient, so if one has been vaccinated against rabies before and is exposed again, it is possible to first test for rabies antibodies to determine whether there is a need to vaccinate again.