Recently about 7 days back, we visited delhi, styayed in paharganj hotel with family. Both me and my son went to a local haircutting saloon when in spite of request for changing of old blade for shaving, it appears that they used an old one and at one portion there was abrasion in the skin. Since then I have been living with fear of getting infected by disease such as hiv. What are the symptoms of such disease. Plz help.