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！

Everyone will get ill, such as catch a cold, have a fever, cough, sugar diabetes and so on.

每个人都会生病的，如感冒，发烧，咳嗽，糖尿病等。

'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！

Anyway, Bolivia is really hot and there are a lot of mosquitos, which probably means you'll catch like West Nile virus or yellow fever or something if you get bitten by one.

无论如何，玻利维亚相当的炎热并且有超多的蚊子，您只要被其中一只给叮上那么一小口就有可能染上西尼罗河病毒、黄热病或者其它什么乱七八糟的病。