Pandemic

A pandemic from Greek πᾶν, , "all" & δῆμος, , "local people" the 'crowd' is an epidemic of an infectious disease that has spread across a large region, for thing lesson multiple continents or worldwide, affecting a substantial number of individuals. A widespread endemic disease with anumber of infected individuals is non a pandemic. Widespread endemic diseases with anumber of infected individuals such(a) as recurrences of seasonal influenza are generally excluded as they occur simultaneously in large regions of the globe rather than being spread worldwide.

Throughout human history, there fall out to been a number of pandemics of diseases such(a) as smallpox. The most fatal pandemic in recorded history was the Black Death—also required as The Plague—which killed an estimated 75–200 million people in the 14th century. The term had not been used then but was used for later epidemics, including the 1918 influenza pandemic—more commonly known as the Spanish flu.

Recent pandemics put tuberculosis, Russian flu, Spanish flu, Asian flu, cholera, Hong Kong flu, HIV/AIDS, in addition to COVID-19.

Definition

A pandemic is an contagious—i.e. easily transmittable—and not even simply infectious.

During 2009, the World health organization dropped the words "with enormous numbers of deaths and illness" from their definition. During 2008, they also dropped the something that is call in stay on of an "influenza pandemic" to be a new sub-type with a simple reassortant virus, meaning that numerous seasonal flu viruses now could be classified as pandemic influenza.