correct, you'd need to wait and have the type specific herpes igg blood testing repeated 3 months after the last time they had had sex.
This was just a screening because the partner claimed to have tested positive for hepatitis. Not sure about herpes. But no clinical symptoms are being reported. If the test is meaningless then I assume there is really no way to know if the 16 year old has herpes unless the test comes back high positive IgG and/or there are symptoms?
herpes igm testing shouldn't be done on a teenager either. a + igm is meaningless.
any chance of her partner getting tested for herpes? has she had symptoms or was this just a screening?
grace