What is the definition of a communicable disease?

A communicable disease is defined as a disease that can be spread between individuals, typically through various methods such as direct contact, airborne transmission, or vector-borne mechanisms. This definition is critical in public health as it emphasizes the ability of certain diseases to be transmitted from one person to another, which can lead to outbreaks if not properly managed. Understanding this definition helps in implementing preventive measures and control strategies to limit the spread of these diseases within populations. The focus on the transmission aspect makes this definition particularly relevant for health care providers and public health officials when assessing risks and planning interventions.