I have a bad cold.

我得了重感冒。

youdao

I'm sick. I have a bad cold.

我生病了。我有重感冒。

youdao

I know. I have a bad cold.

我知道。我得了重感冒了。

youdao

Older children and adults who have whooping cough often appear to have a bad cold or persistent cough that can be so severe that it causes vomiting.

CNN: Can breast-feeding prevent whooping cough?

Missed several workouts, some because of work, some because of a cold, but each missed workout and bite of bad food in the past would have derailed me.

CNN: Paging Dr. Gupta Blog