Department of Medical Engineering and Physics, Royal Perth Hospital, Western Australia 6847,
Valendar F. Turner, John Papadimitriou, Barry A. P. Page, David A. Causer, Helman Alfonso
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his rapid response "Divergent HIV strains and antibody tests" (14th
October 2003), Christopher Noble gave 6 tests in answer to our question
regarding the antibody tests that include HIV-1 group O specific
antigens. Would he please tell us:
(i) in which countries these tests are routinely used?
(ii) Are they use as screening tests or as confirmatory tests?
Competing interests: None declared