What is a unique feature of disease?

A unique feature of disease is its ability to spread and affect multiple individuals within a population. This phenomenon, known as infectiousness or transmissibility, is a defining characteristic of infectious diseases. Infectious agents, such as bacteria, viruses, fungi, or parasites, have the capacity to be passed from one host to another through various means, including direct contact, airborne transmission, waterborne transmission, or vector-borne transmission. This ability to spread contributes to the prevalence and persistence of diseases within communities and can lead to outbreaks, epidemics, or even pandemics, depending on the severity and extent of transmission.