Hello and welcome to E health forum.
ELISA for HIV antibody are accurate after 4 - 6 weeks after exposure. â90% of normal individuals who have HIV âââexposure, will seroconvert within 4-6 weeks.
The âsensitivity âof the ELISA test is 99.9%. â
Since it has been 4 years since the episode, the validity of the test done now, is very accurate and valid.
There is no need to repeat any other tests for this, since you are HIV negative.