Did you know you can get all the medical supplies you want by clinking the Industrial Scientific category then the professional medical supplies category to get medical needles and instruments to destroy them after use? Disposable syringes should not be used in any case. They should be discarded immediately so that they can be destroyed. When syringes are re-used then you open the door to get Hepatitis A, B, C, HIV-1 and HIV-2. Used medical needles and syringes could be the primary or secondary means of transmission of these diseases rather than by sexual means.