This document discusses safe injection practices and preventing disease transmission. It defines injection safety as including practices to prevent transmitting infections between patients or patients and healthcare providers, as well as preventing harms like needlestick injuries. Safe injections do not harm the recipient, expose providers to risks, or result in dangerous waste. The document explains that following safe injection practices prevents transmitting pathogens via contaminated equipment or medications from an infectious source to a susceptible person. It distinguishes between single-dose and multi-dose vials, noting multi-dose vials are only intended for one patient and should be discarded after the beyond-use date.