1 test
Anon_136251 posted:
I only had one HIV test after 90 days from the encounter which came back negative. Is one test sufficient to know my status?
georgiagail responded:
Yes, it is.

The important part is to take the test when enough time has passed that, if infected, there will be enough antibodies present to be picked up by current testing methods.

By 90 days after a potential exposure, 99.9 percent of newly infected folks will have enough antibodies present for a "positive/reactive" test result.

The fact that your test came back negative/non-reactive means that no antibodies were present and indicates that you are HIV negative.