Abstract: Transmissible diseases, also known as communicable or infectious diseases, are a major public health concern worldwide. They are caused by pathogenic microorganisms and are spread from one host to another through various mechanisms. This article aims to provide a general classification of transmissible diseases based on their modes of transmission. We will explore different transmission routes, including direct, indirect, and vector-borne, and discuss common diseases associated with each category. A clear understanding of these classifications is essential for developing effective prevention and control strategies, as well as for public health education.