Medical devices like syringe needles need to be sterilized and packaged before leaving the factory, right? What is the process of sterilization and packaging?

Sanitization is a must, and materials like this into the human body are generally medical-grade, almost food-grade, and like 304 stainless steel does not need to be divided into levels Default can be used in the medical convenience, the needle this with this, disinfection of the general production of the needle itself is in the clean room inside the production, disinfection of semi-finished products to finished products in the assembly with the syringe, well after the disinfection of the last packaging is also the same, packaging the sealing mouth will also be disinfected once, whether by gamma radiation or other ways to disinfect. Is the same, packaged sealing mouth will also be disinfected once, is the use of gamma radiation disinfection or other ways I'm not sure, depending on the packaging of such medical devices to facilitate the provisions.