 In Nevada, the sharing of needles for drug injections has led to an increase in the spread of HIV and hepatitis B and C. In an effort to reduce the spread of blood borne pathogens, Southern Nevada installed vending machines to give access to sterile needles to those using them for drug injections.Individuals who use these vending machines are required to register with Trac-B and are allowed 2 boxes a week.The boxes contain sterile needles as well as other supplies necessary to reduce the risk of spreading blood borne pathogens.