Abstract
What we are concerned is how the remaining in ignorance of own HIV status is morally valuated. Many medical professionals advance and claim the mandatory HIV testing to a patient who would receive surgical treatments or a pregnant woman in order to prevent transmissions. Now, however, most people living with AIDS/HIV have infected by sexual activities. Due to the harm-to-others principle, we have to ask whether people in general who have sexual activities should be mandatorily tested. Furthermore, the question we have to ask here is to what extent a duty to know own HIV status is obligatory.