Terminology
| Term | Explanation |
|---|---|
| flu | An illness caused by a virus. Symptoms include a runny nose, pain in your throat and fever. |
| allergy | A harmful reaction in your body, caused by a certain substance (such as pollen). |
| Term | Explanation |
|---|---|
| flu | An illness caused by a virus. Symptoms include a runny nose, pain in your throat and fever. |
| allergy | A harmful reaction in your body, caused by a certain substance (such as pollen). |