I have tried to research this question and havent come up with anything specific recently. I think I may have some time ago but may be wrong. It only makes sense to me that someone could show antibodies a year or 2 later. I was tested in early 08 and it was negative for the standard and the musk. A reputible lab was used. I went to Mayo in the winter of that year and they only did one of the tests and it was negative. Dont understand what their thinking was around not doing the 2nd test tho the lab sheet seemed to indicate a lab problem out of their hands.

So my daughter pressed for new blood tests so I can get further confirmation after my eyes tested positve in May this year. My neuro told her yes by phone so we were darn sure we were there yet she pulled the plug and said no.

I see that some here have had tests change because of medications or labs affecting tests. I do not believe that impacted mine. I did ask my neuro if the hyperparathyroidism could impact test and she said no.

Annie59