varicella-zoster igg 2000, 4000 means
A Varicella-Zoster IgG (Immunoglobulin G) test measures the level of antibodies in your blood that are specific to the Varicella-Zoster virus. This virus causes chickenpox and can also reactivate later in life to cause shingles. The IgG antibodies are produced by your immune system in response to a previous infection with the virus or vaccination … Read more