ONE of the questions we get asked on the myriad of health questionnaires that we have to fill in at the doctors, chiropractors or for x-rays is - do you are any of your family have Creutzfeldt-Jakob disease? Most of us will fortunately answer ‘No,’ but what is it?

Creutzfeldt-Jakob disease (CJD) is a rare brain disease that is caused by abnormal brain proteins called prions. Classical CJD usually occurs by chance.