Biotech Values

[zipjet]

What is the point of testing Tysabri patients for JC virus if those who test positive are going to continue on the drug anyhow?

That is a good question.

One answer is that 50% (those negative) can relax.

But I wonder if the truth is more complex. Patients are only being told they are positive or negative. Is that really all the test does? Is there no measure of viral titer? Or is that being done and not being released? Or is this being done to establish some baseline counting on better tests later?

ij