d for use in the injection device shown in FIGS. 1A and 1B. [0023]FIG. 3C is a top view of an alternative embodiment of a guard for use in the injection device shown in FIGS. 1A and 1B. [0024]FIG. 4A is a side view of a second preferred embodiment of an injection device, including a guard in a retracted position, in accordance with the present invention. [0025]FIG. 4B is a side view of a second pr