11. How do antibody-based
tests detect how HIV infection
works?

Gap-fill exercise

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After the infection by HIV the
immune system the production
of antibodies ( immune
response) against the . The tests
ELISA (enzyme-linked
assay) and Western-blot search the
presence of specific against
HIV antigens in samples. Since
only one ELISA is not
conclusive, false positive testsmay
happen, Western-blot test is often
after the positive ELISA.