Is gangrene contagious? someone keeps coming to these meetings with it and wont go for intravenous antibiotics and has her feet exposed and it smells

Gangrene won't sprea: Gangrene does not spread by contact. It is a vascular problem that has led to tissue death and subsequent gangrene. That person's foot needs to be treated and a procedure done to help it heal.

Not contagious: But exposed wounds exposed wound may transmit infections to others if they have even a minor wounds , will get infected , ask the person gently to cover the wounds with sterile dressings