if you want to monitor current activity of the viruses, you need LTT blood tests. IgG just shows you past exposure, which is more or less useless for the common viruses everybody has had once in childhood: EBV, CMV, Coxackie. Everybody has antibodies to these...
LTT shows you the current activity of the virus. It does this by counting the immune cells that are designed specifically to destroy that particular virus. These cells are more frequent when the virus is active and they become dormant when the virus is dormant. So they can show if you have an active viral infection.
A note on these viruses EBV, CMV, Coxackie, HHV-6, once they infect you, you will always have them. But later in life they will not be able to create the disease because their number will be kept very low by the immune system. That is the story until you get infected with Borrelia, which suppresses the immune system and all these old folks you acquired since childhood come out from the hiding and start a big party in celebration of your immune systems' demise...
That is exactly what happens with AIDS people, but only 100 times worse as their immune system gets completely destroyed. You will not hear of AIDS people dying because of HIV. They die of flu, common cold, candida, cancer (because the immune system is not strong enough to kill of tumor cells).
Post Edited (mpost) : 1/23/2016 8:50:17 AM (GMT-7)