| lack of evidence for the transmission of jc polyomavirus between human populations. | human polyomavirus jc virus (jcv), the causative agent of progressive multifocal leukoencephalopathy, is ubiquitous in humans, infecting children asymptomatically then persisting in renal tissue. since jcv dna can readily be detected from urine, it should be a useful tool with which to study the mode of virus transmission in humans. based on this notion, we examined the extent to which jcv was transmitted from the american to japanese populations in okinawa island, japan. (a population of about ... | 1997 | 9191854 |