I dare say you'll catch a bad cold, or a fever: you have something the matter with you now! '!

我敢说你一定要受凉，或者发烧：你现在就有点不大对了！

youdao

'I don't think you should stay outside at night, Sir. You'll catch a bad cold or a fever!'

我觉得您不该在外面过夜，先生。您会感冒发烧的！

youdao

Many people who catch measles will have a fever, a rash and feel generally unwell.

BBC: 'Alarm' at suspect measles cases

Many people who catch measles will have a fever, cough, red eyes, and blocked nose and feel generally unwell.

BBC: Measles: 189 cases in Swansea, Neath and Port Talbot