Four Thieves vinegar is used as a repellent to disease, negative energies, influences and forces. 
In Medievil times, four thieves were said to rob the homes of those suffering from illness and those who had died from the 17th century plague, the Black Death.  It is said that on moonless nights in Marseilles, France, the thieves would anoint their bodies in vinegar that had been infused with "protective" herbs now known to have antibacterial and antiviral properties.  This herbal vinegar was thought to give the thieves an advantage against contracting the illness. 
For Curio Use Only: Not for Consumption!