essay on epidemic diseases
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Step-by-step explanation:
An epidemic (from Greek ἐπί epi "upon or above" and δῆμος demos "people") is the rapid spread of disease to a large number of people in a given population within a short period of time. For example, in meningococcal infections, an attack rate in excess of 15 cases per 100,000 people for two consecutive weeks is considered an epidemic.[1
Answer:
An epidemic is an occurrence of disease that is temporarily of high prevalence. An epidemic occurring over a wide geographical area is called pandemic.
The rise and decline in epidemic prevalence of an infectious disease is a probability phenomenon dependent upon transfer of an effective dose of the infectious agent from an infected individual to a susceptible one. Following an epidemic, the host population becomes susceptible because of the deterioration of individual immunity; the removal of immune individuals by death; and the influx of susceptible individuals by birth. The time elapsing between successive epidemic peaks is variable and differs from one disease to another.