if you have sterile needles and do it in a clean enviroment then you have nothing to worry about. the only way youre going to get infected is from dirty needles. if youre really worried about it by some iodine and clean the injection site before you inject the aas. and some anti bacterial cream would do great but thats only if youre ocd about it. youll be fine as long as you open the needle. inject aas. throw needle away never to be used again. just keep changing sites of the IM too. so scare tissue doesnt develop. dont inject at the same site more than twice per week.