Unsafe injections.

In many developing countries use of unsterilized or improperly sterilized needles and syringes is common and causes millions of cases of viral hepatitis B and C as well as contributing to the spread of human immunodeficiency virus (HIV) and other bloodborne pathogens. To combat this problem, WHO has stimulated the development of the "auto-destruct" syringe and encourages all donors, international agencies, and health departments to include a supply of such syringes with all vaccines supplied for emergency purposes. In addition, health providers and the public need to be educated about the risk of inappropriate and unsterile injections.