Alternative flowchart for HIV screening and sequential confirmation (accessible version) - GOV.UK

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For reporting comments please use the results table and reporting comments for HIV.


If no, report as HIV Ag/Ab not detected. End of laboratory pathway.


If no, inconclusive result. Repeat serology in 2 weeks and request an EDTA sample for HIV viral load. Go to step 4.


If yes, complete confirmation with typing assay. Go to step 3.


If no, possible early infection. Repeat serology in 2 weeks and request an EDTA sample for HIV viral load. Go to step 5.


If yes, complete confirmation with typing assay. End of laboratory pathway.


If no, if serology is unchanged and HIV-1 RNA not detected, or neither serology nor HIV-1 RNA detected, report no evidence of HIV infection (false positive). End of laboratory pathway.


If yes, report HIV-1 infection confirmed. End of laboratory pathway.


If no, report as no evidence of HIV infection (false positive). End of laboratory pathway.