The test detects antibodies. There's only so much to tell from that. What symptoms you'll have, when you'll have them, if you had it a long time ago, if you are

The test detects antibodies. There's only so much to tell from that. What symptoms you'll have, when you'll have them, if you had it a long time ago, if you are infected but haven't produced the antibodies yet... these are things we can't tell just from the presence/absence of antibodies.