The best way to open a door using your arm - not your hands:

The ArmPull

The ArmPull (TM) is a high-quality, heavy duty, stainless steel handle mounted above or instead of a traditional door handle.  The ArmPull allows the user to easily open a door by pulling with their forearm rather than their hand.  By never touching the door with their hands, the spread of germs and viruses is greatly reduced. Mount straight up, as shown, or sideways.

Like the Footpull, the ArmPull is Made in the USA.