a blood test to determine if you have immnuity to varicella (chicken pox).
Natural immunity to chickenpox results from previous infection. There is no other way to be naturally immune to chickenpox. Sometimes, the previous infection may be mild enough that the disease was not noticed. You can become artificially immune to chickenpox by getting chickenpox vaccine.
Kids that have been vacinated against say chicken pox can in fact still get the chicken pox. This in fact just happened to my neice right before thanksgiving. In Michigan they just upped the dosage of one vaccination to two to decrease the out break of the chicken pox because one dose isn't enough to protect against that strand anymore.
Of course, there's always the chance
No, you don't need to fast for the blood test for chickenpox.
You do not need to fast for a chickenpox blood test.
I never did.
A case of chickenpox in childhood normally confers lifelong immunity, regardless of the severity of the case. The cellular immunity that prevents chickenpox can decline with time due to age or from immunosuppression from medications or health conditions. But I wonder if you might be asking why a blood test for chickenpox antibodies would be negative if you had chickenpox as a child. There are two possible explanations. One is that the original diagnosis of chickenpox was wrong. The other is that you have a false negative test; this can happen sometimes even when you are still immune. In either case, a vaccine for chickenpox may be a good choice. Talk with your healthcare provider about what makes sense give your medical history.
I never did.
A culture will reliably distinguish herpes from chickenpox
no not likely,, a test is never usually wrong wen it says positive,,
A chickenpox antibody test will not detect marijuana. If you are having such a test for a pre-employment physical, drug testing may be part of the exam.