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Hbsag positive

What is the difference between hbsag test done by elisa and elfa method? I am a bit confused since the my wife is hbsag positive and her hbsag elfa method test results are varying after every 12 weeks. What does it mean? if the percentage decreases does that mean that she is recovering? please suggest in this regards.
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Doctor Answers (2) on Hbsag positive

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Dr.Swarup Kumar Ghosh. Kolkata | General Physician
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Same flow
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Venkat Raghav Bangalore | General Physician
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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......
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