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An epidemic is the rapid spread of disease to a large number of people in a given population within a short period of time; in meningococcal infections, an attack rate in excess of 15 cases per 100,000 people for two consecutive weeks is considered an epidemic. [1]
Example of an epidemic showing the number of new infections over time. An epidemic (from Greek ἐπί epi "upon or above" and δῆμος demos "people") is the rapid spread of disease to a large number of hosts in a given population within a short period of time.
The terms "outbreak" and "epidemic" have often been used interchangeably. Researchers Manfred S. Green and colleagues propose that the latter term be restricted to larger events, pointing out that Chambers Concise Dictionary and Stedman's Medical Dictionary acknowledge this distinction.
The coronavirus is on everyone’s minds. As an epidemiologist, I find it interesting to hear people using technical terms – like quarantine or super spreader or reproductive number – that my ...
1900–1904 San Francisco plague epidemic; 1916 New York City polio epidemic; 1918–1930 Encephalitis lethargica epidemic; 1924 Los Angeles pneumonic plague outbreak; 1924–1925 Minnesota smallpox epidemic; 1947 New York City smallpox outbreak; 1962-1965 rubella epidemic [2] 1976 Philadelphia Legionnaires' disease outbreak; 1976 swine flu ...
2014 Odisha hepatitis outbreak; 2015 United States H5N2 outbreak; 2016 Angola and DR Congo yellow fever outbreak; 2018 Madagascar measles outbreak; 2019 New York measles outbreak; 2019–2020 dengue fever epidemic; 2021 Nipah virus outbreak in Kerala; 2023–2024 mpox epidemic; 2024 dengue outbreak in Latin America and the Caribbean; 2024 Gaza ...
Before and after photos of the deadly wildfires in the Los Angeles area have sent tens of thousands scrambling for safety and decimated neighborhoods.
The Plague of Athens (c. 1652 –1654) by Michiel Sweerts, illustrating the devastating epidemic that struck Athens in 430 BC, as described by the historian Thucydides. The United States Centers for Disease Control and Prevention defines epidemic broadly: "Epidemic refers to an increase, often sudden, in the number of cases of a disease above what is normally expected in that population in ...