A patient comes to hospital with a history of sore throat, diarrhoea and sexual contact 2 weeks before. The best investigation to rule out HIV is -
following a single massive imfection the p24Ag is the earliest marker appear in blood REF:MICROBIOLOGY ANANTHA NARAYANAN NINTH EDITION PAGE.577
P24 antigen assay
ELISA
Western blot
Lymphnode biopsy
Virology