Hep C is transmitted through blood to blood contact. Infected blood has to enter the bloodstream of a non-infected person to transmit the virus. Before 1992 blood transfusions or blood products given to people such as hemophiliacs, and people who received organs, were at risk. At high risk are people who share needles and works in IV drug use. Healthcare workers who have a needlestick or babies born to infected mothers have a small risk. Receiving a tattoo or piercing under unsanitary conditions and exposure to blood on personal hygiene items such as toothbrushes and razors cause some cases of hep C. Sexual transmission between couples with multiple sexual partners or people with STI's are at low risk, as well.