Definitions ● Infectious disease感染病( cause The disease caused by infection and or capable being communicable by infection ● Communicable( contagious) disease传染病( transmission) The disease capable of being transmitted from one person to another or from animals intermediate host to human ● Epidemic disease流行病( ncidence) The occurrence of cases of disease in excess of what is usually expected for a given period of time (epidemic hysteria ● Endemic disease地方病( ocation) The disease that is constantly present in people living in a particular location(endemic thyroid disease-goiterDefinitions  Infectious disease 感染病(cause) The disease caused by infection and/or capable being communicable by infection  Communicable （contangious）disease 传染病(transmission) The disease capable of being transmitted from one person to another or from animals (intermediate host) to human.  Epidemic disease流行病(incidence) The occurrence of cases of disease in excess of what is usually expected for a given period of time. (epidemic hysteria)  Endemic disease 地方病(location) The disease that is constantly present in people living in a particular location (endemic thyroid disease-goiter)