I am JC positive. First test done 1 1/2 years ago came back with a titer of 1.12. Just had another test recently that came back as 0.77. Does anyone know how the titer can change like this. A few more points and I would be negative. I understand that once you are positive you will never be negative but I was surprised to see this difference in the two tests.
Anyone who understands this test please weigh in on this.
Anyone who understands this test please weigh in on this.
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