| http://www.w3.org/ns/prov#value | - This usually is due to the presence of antibodies to other diseases that the ELISA mistakenly recognizes as antibodies to HIV. For this reason, it is important to supplement a positive ELISA with a confirmatory test, such as a Western blot, that is less sensitive but more specific, that is, one that has a lower rate of producing a false-positive result.
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