What is variant CJD vCJD Rare fatal prion disease facts

It is a zoonotic form of human prion disease, originating from dietary contamination of human food with material from bovine spongiform encephalopathy (BSE)-affected cattle. It has important epidemiologic, clinical, and neuropatho …

Variant Creutzfeldt-Jakob disease (vCJD) is an always fatal prion disease first described in 1996 in the United Kingdom. It occurs when people eat beef from cows infected with bovine spongiform encephalopathy (BSE).

Variant Creutzfeldt-Jakob disease (vCJD) is a rare disease caused by a prion, an infectious protein.

Jan. 21, 2026 · Classic CJD is an always-fatal, usually fast-moving disease that occurs worldwide.

Variant Creutzfeldt–Jakob disease ... molecular and animal studies.3,5,6 In total, vCJD has accounted for 232 recognized cases worldwide as of 2024, with the vast majority (178 cases) occurring in the UK.4 Cases were reported ...

The infection that causes the disease in cows is thought to be the same one that causes vCJD in humans. Variant CJD causes less than 1% of all CJD cases. It tends to affect younger people. Fewer than 200 people worldwide have had this disease.

Editor—Venters's reappraisal of variant Creutzfeldt-Jakob disease (vCJD) is important3-1 because, even if new cases of the disease continue to be reported sporadically or in an occasional cluster, there is no evidence of an epidemic anywhere.3-2 But in dismissing the misfolded prion glycoprotein that “causes” bovine spongiform encephalopathy (BSE) as the cause of variant Creutzfeldt-Jakob disease in humans Venters overlooks other findings that support his argument.3-3

The accumulated evidence now strongly suggests that the sporadically, iatrogenically and familially occurring forms of human prion disease, collectively termed “classic Creutzfeldt–Jakob disease” (cCJD), do not currently constitute a serious threat to the safety of the blood supply, despite strong evidence that this subset of diseases can under certain circumstances be transmitted between individuals by iatrogenic routes.6,7 This rationale led to a policy decision by Health Canada in 1998 that recalls and withdrawals of blood products were not indicated by virtue of those products' association with donors found later to have developed cCJD.8 However, the recent appearance in the United Kingdom of vCJD and BSE as novel prion diseases has led to unprecedented challenges on several levels.

Most people have the same risk of vCJD.