Chicken pox, am I immune?

Am I immune to chickenpox?
Test for Varicella zoster IgG antibodies.
Some people need this test for their employer.

Immunity against Varicella Zoster

For screening for immunity to Varicella Zoster, it is sufficient to measure IgG antibodies in blood (serum).
IgG antibodies appear later than IgM antibodies and basically remain positive for life.

Chickenpox occurs with the first infection with the varicellazoster virus and is a highly contagious, but generally harmless childhood disease, although complications can occur with it as well. Symptoms are more severe in adults and especially in pregnant women. Shingles occurs as local reactivation of latently present Varicella Zoster Virus in people who have ever experienced varicella.

If the result is positive, it indicates that you are less susceptible to VZV infection.
A significant VZV IgG titer increase can show a reactivated VZV infection. A reactivated infection can manifest as shingles (Herpes zoster), facial paralysis or nerve inflammation.

The method used for Varicella IgG is standardized to current WHO standards. The guidelines of the Robert Koch Institute (Germany) for determining immune status is at 100 IU/l. Results higher than this cut-off mean a protective titer of antibodies. The serologic immune response is quite slow to emerge in recent Varicella infection (chickenpox, chickenpox). In this case, a check after at least 2 weeks is indicated to demonstrate a titer rise/seroconversion.