My daughter came down with the chicken pox.
我女儿【患上了】水痘。

My sister got food poisoning when she ate at that restaurant.
我姐姐在饭店吃饭后食物中毒。

I don't want to catch a cold! *
我不想【得】感冒！

*'catch' is normally used with contagious illnesses like the flu and cold

Have you been vaccinated against the swine flu?
你打猪流感疫苗了吗？

Kyle is allergic to peanuts.
我对花生【过敏】。

The flu epidemic of 1918 killed between 50 and 100 million people.
1918年的大流感造成5000万到1亿人死亡。

Have you ever sneezed three times in a row?
你有连着打三个喷嚏吗？

-bless you
上帝保佑你（通常在他人打喷嚏时说的话）

my nose is stopped up
我的鼻子塞住了

I'm feeling kind of dizzy.
我有点头晕。