High-risk groups for HBV infection People from endemic regions Babies of mothers with chronic HBV Intravenous drug abusers People with multiple sex partners Hemophiliacs and other patients requiting blood and blood product treatments Health care personnel who have contact with blood Residents and staff members of institutions for the mentally retardedHigh-risk groups for HBV infection • People from endemic regions • Babies of mothers with chronic HBV • Intravenous drug abusers • People with multiple sex partners • Hemophiliacs and other patients requiting blood and blood product treatments • Health care personnel who have contact with blood • Residents and staff members of institutions for the mentally retarded