TABLE 1.

Quantification of JCV DNA by qPCR in the brain, brain stem, kidney, spleen, and lymph node extracted from a PML patient

Sample typea	No. of JCV copies/μg of DNA in:
	Brain	Brain stem	Kidney	Spleen	Lymph node
FFPE	194	6 × 108	249	725	1.41 × 103
Frozen	1.00 × 108	4.70 × 109	1.10 × 104	8,309	1.57 × 103

^aFrozen, frozen at −80°C; FFPE, formalin fixed, paraffin embedded.