Cap with hemisphere portion for medical injector

A medical injector comprising:

• an injector housing defining a reservoir;
• a plunger rod;
• a stopper engaged with a portion of the plunger rod and slidably disposed within the reservoir, the stopper sized relative to an interior of the injector housing to provide sealing engagement with a sidewall of the injector housing;
• a needle having a sharpened first end and a second end in communication with the reservoir;
• a first cap covering the sharpened first end of the needle;
• and
• a second cap covering at least a part of the first cap, the second cap comprising a body having a proximal end, a distal end, and a hemispherical member including a gripping component for accommodating at least a portion of a user's fingers to aid the user in removing the second cap, wherein the second cap is engaged with the first cap such that removal of the second cap simultaneously removes the first cap from the sharpened first end of the needle,
• wherein the hemispherical member has a first diameter and a second diameter located distally of the first diameter, the second diameter being larger than the first diameter.