What is PML

Progressive multifocal leukoencephalopathy (PML) is, in the general population, a rare but serious infection of the central nervous system (CNS) that can and usually does lead to severe disability or death.1 It is caused by the combination of a common infection by a virus known as JC virus, (John Cunningham virus) and additional risk factors that include a weakened immune system and possibly genetic factors.

what is PML

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