W. Va. Code § 21-3E-13: Defamation.

No cause of action for defamation of character, libel, slander or damage to reputation is or shall be established for any person against any employer who has established a program of drug or alcohol testing in accordance with this article, unless:

(1) The results of that test were disclosed to a person other than the employer, an authorized employee, agent or representative of the employer, the tested employee, or the tested prospective employee, or the authorized agent or representative of the employee; and

(2) All elements of an action for defamation of character, libel, slander or damage to reputation as established by the relevant state statute or common law are satisfied.