In 1996, the human version of mad cow disease, new variant Creutzfeldt-Jakob disease, was identified.
New variant Creutzfeldt-Jakob is not known to have occurred in the United States.
When it results from eating tainted beef, the disease is called new variant Creutzfeldt-Jakob.
But in recent years, a new variant has emerged called spear phishing, which is much more personal.
"Then they said that the tests had shown that he had a new variant of Creutzfeldt-Jakob disease," he said.
One of the biggest mysteries is why the new variant form of the disease attacks young people, Dr. Will said.
New variant Creutzfeldt-Jakob that came from cows has many distinct features that make the diagnosis unmistakable, he said.
Eighty-eight people have died from or have been found to have the new variant, Creutzfeldt-Jakob dinease, in Britain.
Should the new variant of NEK1 work less well, faults in DNA could build up as people grow old.
One, called BadTrans.B, is a new variant of an existing program and was detected over the weekend in Europe.
A human form of mad cow disease, called new variant Creutzfeldt-Jakob disease, has killed 125 people, mostly Britons.
