Hello,I am sorry for my poor English.I have 2 questions .1.The doctor H. Hunter Handsfield, M.D. says avoid HIV is choose your sex partners wisely, use condoms for non-monogamous vaginal or anal sex, and do not share drug injection equipment with other people. That's it. Ignore any and all other events you may encounter. It is only suitable people in USA or people around the world.I am from China,can I use it? 2.When doctors answer the questions , can they see people who ask the question where are they from?