VZV IgG (CSF) assayis intended for in vitro diagnosis of VZV associated diseases, namelyvaricella and herpes zoster, including their neurological complications, i.e.encephalitis, meningitis, cerebellitis, vacsulitis, myelitis or inflammatory neuropathies. The diagnostic kit can also be utilized for differential diagnosis of neuro infections, infections of eye and skin exanthematous diseases.