State the use of interferon and insulin in medicines.

Explanation

**Step-by-Step Solution:**

1. **Understanding Interferon:**
- Interferon is a type of protein that is produced by the body in response to viral infections and certain other stimuli. It plays a crucial role in the immune response.

2. **Uses of Interferon:**
- Interferon is primarily used in medicine to treat various types of cancers, such as:
- **Leukemia:** A type of cancer that affects blood and bone marrow.
...