Define disease

Explanation

**Step-by-Step Text Solution:**

1. **Definition of Disease**: A disease is a condition that occurs when one or more organs or systems in the body are affected and do not function properly.

2. **Characteristics of Disease**: Every disease is characterized by specific signs and symptoms. These signs and symptoms help in identifying the disease.

3. **Types of Diseases**:
- **Congenital Diseases**: These are diseases that are present at birth. They can be due to genetic factors or mutations. Examples include color blindness and Down syndrome.
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