Learn to give injections without causing infection 

A primer on the basics 

The Centers for Disease Control and Prevention recommends the infection control measures for health care providers who administer parenteral substances by injection. A needle or syringe that previously has been used to inoculate a patient is considered contaminated and should not be used to aspirate medication or vaccine from a multidose vial if any of the contents of the vial subsequently will be administered to another patient.

All hypodermic needles, as well as the lumens of syringes used to administer parenteral substances, should be sterile. Needles and syringes manufactured for single use only should be discarded and not reprocessed or reused on a different patient because the reprocessing method may not sterilize the internal surfaces and/or may alter the integrity of the device. Reusable needles and syringes should be cleaned then sterilized by standard heat-based sterilization methods (e.g., steam autoclave or dry-air oven) between uses. Reprocessing reusable needles and syringes by use of liquid chemical germicides cannot guarantee sterility and is not recommended.¹

Reference

1. Centers for Disease Control and Prevention. Improper infection-control practices during employee vaccination programs � District of Columbia and Pennsylvania, 1993. MMWR 1993; 42(50):969-971.