Wis. Stat. § 901.05: Admissibility of certain test results.

(1) In this section, “HIV” means any strain of human immunodeficiency virus, which causes acquired immunodeficiency syndrome.

(2) Except as provided in sub. (3), the results of an HIV test, as defined in s. 252.01 (2m), are not admissible during the course of a civil or criminal action or proceeding or an administrative proceeding, as evidence of a person’s character or a trait of his or her character for the purpose of proving that he or she acted in conformity with that character on a particular occasion unless the evidence is admissible under s. 904.04 (1) or 904.05 (2) and unless the following procedures are used:

(a) The court may determine the admissibility of evidence under this section only upon a pretrial motion.

(b) Evidence which is admissible under this section must be determined by the court upon pretrial motion to be material to a fact at issue in the case and of sufficient probative value to outweigh its inflammatory and prejudicial nature before it may be introduced at trial.

(3) The results of a test or tests under s. 938.296 (4) or (5) or 968.38 (4), (5), or (6) and the fact that a person has been ordered to submit to such a test or tests under s. 938.296 (4) or (5) or 968.38 (4), (5), or (6) are not admissible during the course of a civil or criminal action or proceeding or an administrative proceeding.