Hello everyone. I'm new to this forum, let me ask a few things according to the title of my question because this has been bothering me quite a lot lately:
1. Why is the index value on the HIV test never 0 & always fluctuating? What factors cause this? Can someone help me provide a scientific explanation regarding this?
2. On November 4, 2023, I went to the barber to cut my hair. When the barber was shaving my mustache, at first glance I felt like a razor was scratching my upper lip, then I reflexively immediately touched my upper lip to see if there was any blood & as far as I remember there was no blood. Then the barber washed my upper lip after shaving my mustache using a towel/tissue (I can't remember if he used a towel/tissue but I didn't feel any stinging when the barber washed my upper lip. I assume there were scratches, I will definitely feel sore). After everything was finished, I checked my lips in front of the mirror & I didn't see any scratches (my assumption was that if there were scratches the marks would definitely be visible). I was the first customer that day & I saw it quite clearly he changed the razor (but then after I went home I became doubtful whether he changed the razor or not). I assume that the barber forgot to replace the razor with a new one, then there was HIV+ blood left on the razor from the customer at the previous day then touched the scratch on my upper lip, what is the risk of HIV transmission from this incident?
Thank you for reading & any response would be greatly appreciated