Why are communicable diseases also called infectious diseases?

Explanation

### Step-by-Step Solution:

1. **Definition of Communicable Diseases**:
- Communicable diseases are illnesses that can be transmitted from one person to another. They are often caused by pathogens such as bacteria, viruses, fungi, or parasites.

2. **Transmission**:
- These diseases can spread through various means, including direct contact, respiratory droplets, contaminated surfaces, or vectors like insects.

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