Table 1:

Categories of risk that a person has transmissible HIV infection (2)– (4)

RiskExamples
Substantial

  • HIV positive and viremic (i.e., viral load > 40 copies/mL)

  • HIV status unknown, but from a population with high HIV prevalence compared with the general population (e.g., men who have sex with men, people who inject drugs)

Low but nonzero

  • HIV positive and believed to have a viral load < 40 copies/mL; with concomitant sexually transmitted infection present at the time of exposure.

Negligible or none

  • Confirmed HIV negative

  • HIV positive with confirmed viral load < 40 copies/mL and no known sexually transmitted infections present at time of exposure

  • HIV status unknown, general population