False positive ELISA for HIV -

False positive ELISA is seen in - Antibodies to class II antigens - Recent influenza vaccination Auto antibo dies  - Acute viral infections Hepatic disease  - Connective tissue diseases e.g. SLE. ELISA is the standard screening test for HIV infection It has a sensitivity of > 99.5%, while it is highly sensitive, it is not optimal in regard to specificity. Most commonly used confirmatory test for the diagnosis of HIV infection - a Western Blot test