Hello Doctor, Today I went to an diagnostic lab to check my blood group, then they brought me a packed disposable syringe (company: DORA), I opened the pack myself and they applied surgical spirit on my hand and while the man drawing blood from my vein I observed some rust like thing on the outer body of needle (somewhere in the middle), SHOULD I WORRY about the infections, especially STD like HIV, HCV, etc. And the new disposable syringe used only for me. AM I safe? Please Reply Doctor.