has function has role immunizes recipient Homo sapiens preventive vaccine function licensed vaccine role licensed human hepatitis A immune globulin passive vaccine Hep A,IG Stapleton, Jack T. "Passive immunization against hepatitis A." Vaccine 10 (1992): S45-S47. Hep A, IG Hepatitis A Immune Globulin passive vaccine is a passive vaccine that provides protection against hepatitis A through the passive transfer of an antibody. Hep A, IG provides temporary immunity to the virus for two to three months, if administered prior to exposure or within two weeks after exposure. 154 Hepatitis A immune globulin Hepatitis A immune globulin vaccine licensed human immune globulin passive vaccine