James is 23 years old and attends the GP surgery concerned about his risk of having contracted HIV. He reports having unprotected intercourse with a new male partner 9 weeks ago. He has already visited the genitourinary medicine clinic and had a HIV test 5 weeks ago which has come back negative. He tells you they told him it was a fourth generation test.
Although his initial HIV test has come back negative, how long after the exposure should he wait to be re-tested in order to fully exclude HIV?
