Diseases Elimination and Eradication
Eradication is the reduction of an infectious disease's prevalence in the global host population to zero.It is sometimes confused with elimination, which describes either the reduction of an infectious disease's prevalence in a regional population to zero, or the reduction of the global prevalence to a negligible amount. Further confusion arises from the use of the term eradication to refer to the total removal of a given pathogen from an individual (also known as clearance of an infection), particularly in the context of HIV and certain other viruses where such cures are sought. In today’s world of rapid travel and transport, re-introduction of infectious diseases occurs not only locally: humans, insects, livestock and food products carry infectious agents from country to country and from continent to continent. Infectious agents carried by humans are often asymptomatic or in the incubation period, while those carried by vectors, livestock and food often remain silent.