Hello ......The Enzyme-Linked Fluourescent Assay (ELFA) is a slightly newer version of the Enzyme-Linked Immunosorbent Assay (ELISA) test. Both work in a similar way but the ELFA has a window period which is about 5 days shorter than the ELISA test...antibodies to hbsag is sign of recovery from diseases......
Answered2016-08-26 16:44:54
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