An Iranian researcher designed a needle-free injection system which does not cause any pain for the patients and does not transfer contagious and infectious diseases in injection. Alireza Abbasian, who has designed the tool, said it can be charged easily and in a short time. It makes no pain and bleeding and transfers drugs through pores. The needle-free tool can be used for all groups of people. It does not damage tissues and prevents necrosis. It helps absorption of the medicine and facilitates drug injection by the patient without dangers of needle break, the Iranian students news agency reported. The device also makes direct injection of drug into vessel possible, and lessens the possibility of convey of contagious and infectious diseases. The device can be used for treatment of diseases such as diabetics for injecting insulin and other diseases which need continuous drug injection. The system can help cancer patients and hepatitis patients in order not to feel any pain during injection.