Firstly, we need to clear something up.
Aids is not a virus. You do not become infected with aids. You become infected with hiv, which causes the syndrome of aids after some years. Aids is the condition which a person develops when hiv has caused their immune system to go below a certain level.
Ok, so, to answer your question, only a specific hiv test, such as elisa can confirm hiv status. A normal blood test does not.