Contagious disease

A contagious disease is an illness caused by infectious agents, such as bacteria, viruses, fungi, or parasites, that can be transmitted from one individual to another. These diseases are typically spread through direct contact with an infected person, through respiratory droplets when an infected person coughs or sneezes, or by contact with contaminated surfaces or objects. Contagious diseases often have specific modes of transmission, which can include: 1. **Direct Contact**: Physical contact with an infected person (e.g.