What is the difference between a pandemic and epidemic?
Answers:
A pandemic, or global epidemic, is an outbreak of an infectious disease that affects family over an extensive geographical area (from Greek container all + demos people).
an epidemic (from Greek epi- upon + demos people) is a disease that appears as alien cases in a given human population, during a given time, at a rate that substantially exceeds what is "expected," based on recent experience (the number of unknown cases in the population during a specified extent of time is called the "incidence rate")
While they are almost tantamount, an epidemic refers to a smaller area. Therefore, a situation of flu that affects merely a portion of a state (but is wide spread there) might be call an epidemic. AIDS would be considered a pandemic.
"Pandemic-occurring over a wide geographic nouns and affecting an exceptionally high proportion of the population" www.m-w.com
"Epidemic-affecting or of a mind to affect a disproportionately large number of individuals inwardly a population, community, or region at the same time" www.m-w.com
The difference is essentially semantic. An epidemic is an incidence of an virus (defined as new cases diagnosed per component time in an observed region) greater than expected from prior facts in similar populations. A pandemic is an epidemic that affects a huge geographical area.
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