Confused about how the Roche Elecsys IgG test works.
I’ve seen so many varying numbers on detection rates from the Roche Elecsys IgG test. When it comes to HSV-2, it shows that it has a high sensitivity at about 97% and specificity at about 98%. However, it shows that for HSV-1 it has a much lower sensitivity at about 85% or less, but still a high specificity at about 98%. So I’m wondering, why is the sensitivity for HSV-1 so low when it’s able to detect HSV-2 at a much more accurate rate? And if someone were having an active HSV-1 OB (let’s assume in this case that they’ve had it for a long time), wouldn’t the test become more accurate as your body is now actively producing more antibodies to fight off the infection?