An ARCHITECT HIV Ag/Ab Combo test result that is
nonreactive does not exclude the possibility of exposure to or infection with HIV-1 and/or HIV-2.
Nonreactive results in this assay for individuals with prior exposure to HIV-1 and/or HIV-2 may be due to antigen and antibody levels below the limit of detection of this assay."
Does that mean this test is not reliable even after 3 months? Indeed, in the last sentence, there is no detail about the period when the test is conducted.