Immunization prevents the progress of infection to irreversible complications. Here is detailed guide about preexposure prophylaxis against rabies; https://www.cdc.gov/rabies/specific_groups/travelers/pre-exposure_vaccinations.html Here is another guide about postexposure prophylaxis against rabies; https://www.cdc.gov/rabies/medical_care/index.html WHO guideline for rabies vaccine; https://www.who.int/rabies/PEP_Prophylaxis_guideline_15_12_2014.pdf