The '24' is probably his Guesstimate of the risk. The test is actually not for the Virus, it is for Antibodies to the Virus, which may indicate a possible higher risk. You just have to decide if the benefits out way the risk.

If it gives you a much higher Quality of Life you may be willing to assume a higher risk. It can be a very difficult decision.

I was told by my neurologist that Tysabri was the ONLY THING left for us to try; exhausted all the A, B, C & R drugs can no longer take them for one reason or another. I knew he was involved with the trials testing for the JVC virus & I INSISTED on being tested BEFORE I would even consider Tysabri. The results came back last week I TESTED POSITIVE FOR THE JVC VIRUS!

Trouble has a tendency to find me with me having to look for it so NO I WILL NOT TAKE MY CHANCES ON TYSABRI KNOWING I HAVE THE VIRUS & IF I WAS TAKING IT & FOUND OUT AFTERWARD I WOULD STOP IMMEDIATELY!