After cleaning, do not touch the stopper with your hands or allow it to touch any surface.  Place the vial upright on a clean, flat surface.  Remove the paper backing from the vial adaptor package.  While still in the plastic package, place the vial adaptor on top of the Enbrel vial so that the vial adaptor spike is centered within the raised circle on top of the vial stopper (see Diagram 2).  Hold the vial firmly on the flat surface with one hand.