Taking more rabies vaccine shots than needed does not make your immunity weaker. It may be unnecessary, but it won’t “cancel out” the antibodies you already have.The main downside of repeated unnecessary boosters is just cost, inconvenience, and sometimes mild side effects (like pain, fever, or allergic reaction).If you’re unsure about your protection, you don’t need to keep taking more boosters. Instead, you can do a rabies antibody titer test

Too much unwanted boosters can have issues in immunity production but varies person to person. Go for rabies antibody titer test to know your immunity level