Criminal Offenses - As introduced, adds as an affirmative defense to the offense of criminal exposure of another to human immunodeficiency virus (HIV), proof by a preponderance of the evidence that a person infected with HIV was in compliance with a treatment regime prescribed by the person's healthcare provider to medically suppress the risk of HIV transmission. - Amends TCA Title 39, Chapter 13.

SB 1906 would amend Tennessee law to allow a person infected with HIV to use proof of following their prescribed medical treatment as an affirmative defense in criminal exposure cases. This defense requires showing by a preponderance of evidence that the treatment was suppressing the risk of HIV transmission. The bill directly affects individuals charged with criminal exposure of HIV, providing a legal argument that they took steps to prevent transmission. It changes the existing statute without altering the underlying crime or creating new obligations.