During ARV  vaccination to me by a nurse  of govt hospital , she draws vaccine from the vial by a fresh insulin injection syringe but it  slips to her skin of palm. May or may not be pricked to the skin she used that very syringe to draw vaccine again from the same vial. But after sometime from herself she discard that syringe outside. However, afterwards using a new syringe she draws rest of the vaccine & later on injected to me intradermally. So what is the chance of getting HIV infection by this route??