Auto-Disable Syringes, which are otherwise referred to as “Safety Syringes” or “AD Syringes”, contain internal safety mechanisms, that ensure that after a single use the syringe will not be able to be used a second time. There are several different ways this can be achieved. However all of the various Auto-Disable Syringe designs help to prevent the resale and the reuse of medical devices, while promoting overall sanitation and hygiene. The World Health Organization (WHO) is actively campaigning for more countries across the world to start using Auto-Disable Syringes because they additionally dramatically reduce the spread of disease and infection. Combined, these factors make Auto-Disable Syringes the safest injection devices available.