Reaction

Jc Virus Test Positive reporting signals

Last recalculated 2026-09-14T18:28:35.993900+00:00 · 842 reports · 9 co-occurring drugs

As of the last recalculation, Jc Virus Test Positive appears in 842 FAERS reports alongside 9 co-occurring drug terms. The strongest observed disproportionality signal is FINGOLIMOD HCL (PRR 94.4).

Important: FAERS is a spontaneous, voluntary, unverified reporting system. PRR and ROR identify reporting patterns for investigation; they are not incidence rates and do not establish causation.
DrugCo-reportsPRRROR
Fingolimod Hcl23894.494.7
Natalizumab37289.890.0
Dalfampridine12449.950.0
Teriflunomide4123.523.5
Glatiramer Acetate4419.219.2
Interferon Beta-1B1418.318.4
Baclofen5416.516.5
Interferon Beta-1A10014.414.4
Dimethyl Fumarate5812.412.5

Related reactions

Data source: openFDA FAERS. See the OpenPV methodology and limitations.