Hello, a agab hiv test is accurate at day 28? the lab says it is 97-99% accurate after 24 days but i read that it is after 28 days. it is not a big difference (4 days) but i dont know. i also took an rna test at day 9 (maybe too early?

Day 28th is long enough for a 4th generation HIV test and RNA test is mostly recommended from day 10th, but day 9th is probably fine. By my opinion, if you were tested (-) for both, you are safe.

It is accurate if positive. A negative test result should be repeated at 45 days after exposure. Visit this site for information: HIV test window periods https://www.cdc.gov/hiv/basics/hiv-testing/test-types.html