Disease transmission refers to the process by which infectious agents, such as bacteria or viruses, spread from one individual to another. This can occur through various routes, including direct contact, airborne particles, or contaminated surfaces. Understanding how diseases spread is crucial for preventing outbreaks and protecting public health. There are several modes of transmission, including direct transmission, where an infected person passes the disease to another through physical contact, and indirect transmission, which involves intermediaries like vectors (e.g., mosquitoes) or fomites (e.g., doorknobs). Effective hygiene practices and vaccinations are essential in controlling disease transmission.