Gloves remind you to not touch your face.
Gloves act as a barrier, but also as a collector. For example, if you were nursing a sick person, you would wear nitrile or latex gloves while you were in the room with them. You would remove the gloves by turning inside out from wrist (not contacting fingertips or palms) and put gloves in trash as you leave the room.
If you had gloves that you wore outside the house, you would remove the gloves before entering house.
I personally don’t like single use plastic disposable gloves, but there are PU or vinyl coated reusable (washable) gloves.
Open Source Hardware guide for coronavirus
https://coronavirustechhandbook.com/hardware
Hand operated ventilators
https://www.notechmagazine.com/2020/03/open-source-breathing-ventilators-covid19.html