Dear doctor, I would like to ask some questions to calm my anxiety. Yesterday, I went to trim my eyebrows. I have waited them for about 5mm. I saw that they changed the new blade (but with the same OLD blade-holder). I felt a little bit SORE after shaving. But I have checked and checked and didn t see any blood at all. I m very panic now and worry if I may infected by HIV virus, as I m afraid that there would be some infected blood from last person who used the same blade-holder as mine. Please reply my question. I knew it such a stupid question to ask since I knew it s a new blade, yet I still cannot calm my anxiety. Anyway, I m sorry for my poor English. I came from a Non English speaking country. Hope to see your reply Doctor. Best Regards, Aliz