How is a multiplex test performed? Tech PWN November 30, 2020 16:56 Updated This test is conducted by a nasal swab. This requires insertion of a swab into your nose. Related articles What are the benefits of the multiplex test? Are there any limitations to multiplex tests? What is a multiplex test? Who should not get a multiplex test? What will my multiplex test results tell me? Comments 0 comments Please sign in to leave a comment.