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March 4, 2023 at 1:41 pm #80660
The Igg test misses 30% of HSV 1 infections, compared to the gold standard western blot. Cold sores are almost always caused by HSV 1. If you want to know for certain if you have HSV 1 you can do the herpes western blot or you could have one of the cold sores swab tested for HSV 1, but if you are on daily medication for HSV, you may not have any recurrences.