But as you can see in the article I posted about the thousands of needles being dropped on the streets of Los Angeles by drug users, those once clean needles are now harbingers of disease for others.
Additional needles on the street can never be a result of properly operated needle *exchanges*. It was a result of poor policy and training of workers which is now being addressed.
They have already been proven to greatly reduce new disease rates in addicts by something like 70% in 5 years. This will greatly reduce disease and medical costs to taxpayers