Thank you for the reply. Last year, I had a client in my office, who was HIV positive. I was scared that I might have got infected by him, through drinking water contaminated by him. Or I feel that what if a little of his blood got into the water that I drank. So, I got an HIV third generation test after three months, which was negative. And after five months, I got an HIV fourth generation test, which was also negative. Then a doctor suggested that there is no need to get another HIV test done if there was no sexual exposure. Do I need to be scared? Do I have to get tested again? So far, I have done four HIV tests, which were all negative.