This is referring to postexposure rabies prophylaxis (PRP); see https://www.cdc.gov/rabies/medical_care/ https://www.cdc.gov/rabies/medical_care/ under "Postexp

This is referring to postexposure rabies prophylaxis (PRP); see https://www.cdc.gov/rabies/medical_care/ https://www.cdc.gov/rabies/medical_care/ under "Postexposure Vaccinations": > Rabies postexposure prophylaxis consists of a dose of human rabies immune globulin and rabies vaccine given on the day of the exposure, and then a dose of vaccine given again on days 3, 7, and 14.