I would like to know how teevir tablets work in a much simpler way or just break down the scientific explanation for me please. I have a close friend who had an hiv test twice and the results were a bit confusing because there was one line at the top and a grease like spot at the bottom. My friend then went to another health facility to test but the results were negative. It still disturbs me because my friend bought the teevir tablets and I wonder if it ok for her wellbeing.