A Sexually Transmitted Infection can be transferred into
somebody else by having sex. it cannot be trensferred through a
needle because then it will not be SEXUALLY transmitted it will be
injected so it wont be a sexually transmitted infection. but hiv
can be caught by being injected by an unsterilized needle and you
still shouldn't do it then because all the bacteria mght not be
A STI is a sexually transmitted infection; often used is STD or sexually transmitted disease.
STI stands for Sexually Transmitted Infections. it is an infection that can be treated early if not then there is a higher risk of dying. get it treated before it's to late