I'm HIV negative by Elisa and HIV RNA resulted <400 copies / mL. What does this mean? My last unprotected sexual exposure was in 2006. I'm a nurse & I was splashed with a drop blood from a patient's surgical drain in my eye. The splash happened in October. The HIV tests were drawn in December. My Dr didn't mention the RNA results & said my test was negative. I recently came across my lab results. That's when I found the RNA results. Is this a negative result? Should I be concerned?