There are 3 key components you have control over and which need to remain sterile at all times. They are the needle(s) being used, the injection site(s), and the rubber stopper(s) of each vial you will be drawing from. It is your job to make sure these components do not come in contact with anything other than the intended object. When it comes to ensuring sterility, alcohol is your weapon of choice. Alcohol kills more germs & bacteria safely, than any other household product. Sterilizing an injection site or object is a simple process. Prior to sterilization, clean the area of any debris so that it appears visually clean. Afterwards, grab a alcohol pad or wet a cotton swab with alcohol and wipe the intended area. After the area/object has been sterilized, it should not come in contact with any other unsterilized object.