为了防止疯牛病传播，许多国家禁止进口受感染的牛肉制品。

To prevent the spread of ___mad cow disease, many countries banned the import of infected beef products.

食用受污染的牛肉可能导致疯牛病的人类变异型，即变异型克雅氏病。

Eating contaminated beef can lead to the human variant of ___mad cow disease, called variant Creutzfeldt-Jakob disease.