重感冒在英语中叫做 severe cold。
来源：
"cold"在英语中本来就是指感冒的意思，而"severe"是指严重的、剧烈的。所以"severe cold"就是指严重的感冒。
英文例句及中文翻译：
I have a severe cold and I can't stop coughing. (我有重感冒，咳嗽不止。)
He's been out of work for a week because of a severe cold. (他因为重感冒病了一个星期不能上班。)
My sister has a severe cold and she can't taste anything. (我姐姐有重感冒，什么都没有味道。)