So to start with, we know that the IgG test for HSV 1 misses 30% of infections compared to the gold standard western blot, so your test result may or may not be accurate. Assuming that it is, him taking daily antiviral medication would be useful for reducing transmission but we don’t have any data on how useful it is. We can’t know if his infection is oral or genital so we really don’t know. HSV 1 genital infection is rarely active and if he is it orally without symptoms, he is more likely to shed virus from that location. It’s a complicated situation but daily antiviral medication will be helpful, wherever it is, at least to some degree.
Terri