1. A cold is an illness that can cause coughing, a runny nose, and a sore throat.
2. To cough is to force air loudly through the throat because of an illness or throat irritation.
3. A fever is an illness that causes body temperature to rise.
4. Flu is a viral illness that can cause fevers, aches, and wheezing.
5. A headache is a pain felt in the head.
6. A muscle ache is a pain felt in the muscles.
7. If something is runny, it has liquid flowing or leaking out of it.
8. A symptom is a feeling or physical change that indicates illness.
9. To throb is to have pain that comes and goes very quickly.
10. To wheeze is to breathe with difficulty in a noisy manner.
