Communicable Disease and Infectious Disease.
According to the World Health Orgnization, an emerging infectious disease (EID) is an infectious disease that has appeared in a population for the first time, or that may have existed previously but is rapidly increasing in incidence or geographic range (WHO). Outbreaks are the occurrence of disease cases in excess of what would normally be expected for a community, geographical area or season (WHO). Examples of recent outbreaks affecting public health in United States include Group A Streptococcus, Pertussis, Zika, Mumps, and Measles.
