People keep the personal cleanliness their work area demands. Those who work where a food safety risk exists, glove wearers included, wash and where appropriate disinfect their hands before starting any product or packaging handling (after a break, for instance), straight after using the toilet, straight after handling anything potentially contaminated, after smoking, after eating or drinking, and before putting on or changing gloves.
The graph holds this control, the 0 it maps to, and the evidence behind each claim, over MCP and REST.