Sharing injection equipment, such as needles and syringes, poses a high risk of transmitting bloodborne pathogens. These pathogens include viruses like the Hepatitis C Virus (HCV), Human Immunodeficiency Virus (HIV), and Hepatitis B Virus (HBV). When injection equipment is shared, blood from an infected person can be introduced directly into the bloodstream of another individual, making the transmission of these infections highly efficient.