I will answer one by one
1.Yes, rapid tests may be false positive due to associated parasitic infections like malaria
2.This might be correct
3.Yes , you have to confirm it by Western blotting test
4.These are OD values for various Antigens(Ag) These values are to compared with given OD values for a positive , negative or indeterminate result and accordingly interpreted .These OD values are unique for one type of test with one reagent .Single values can't be interpreted.
5.The main difference between 3rd generation ELISA
tests (also called rapid HIV tests which check for antibodies
only) and DUO tests, as DUO HIV tests check for both antibodies and P24 antigen.
Hope this does help you.
Dr Matin .A. Khan
MBBS, MPH, MMSc (HIV Med) PhD
M.A (Sociology) , M.Sc(Psychology), M.Sc(Counselling
Fellowship in HIV Medicine (School of Tropical Medicine Kolkata, India)
AAHIVS ( American Academy of HIV Medicine USA)
Galen Exam for Certificate of Clinical Competence in HIV Medicine from IAPAC USA
MGM Medical College , Jamshedpur , India