health and well-being
type: Concept
narrower: infectious disease

public health crisis management
type: Concept
narrower: infectious disease

illness
type: Concept
narrower: infectious disease

diseases and medical conditions
type: Concept
narrower: infectious disease

concepts
type: Collection
type: ConceptGroup
member: infectious disease

systemic diseases
type: Concept
narrower: infectious disease

disease, disability, health, and health behavior
type: Concept
narrower: infectious disease

sexually transmitted diseases
type: Concept
broader: infectious disease

infectious disease
type: Concept
broader: health and well-being
broader: disease, disability, health, and health behavior
broader: diseases and medical conditions
broader: public health crisis management
broader: systemic diseases
broader: illness
narrower: sexually transmitted diseases
definition: Infectious disease is any infection or disease caused by certain microbes (called pathogens), such as viruses, bacteria, fungi, parasites (including protozoa and helminths), and atypical proteins known as prions. (Viruses are not considered microbes by strict definition but are included in this discussion.) Infectious disease is determined by the presence of a pathogenic agent and the common symptoms (some are asymptomatic in humans) for the particular microbe. [Source: Encyclopedia of Crisis Management; Infectious Disease]