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In epidemiology, a pandemic is defined as "an epidemic occurring over a very wide area, crossing international boundaries, and usually affecting a large number of people". During the COVID-19 pandemic, as with other pandemics, the meaning of this term has been challenged. [14]
Ongoing epidemics and pandemics are in boldface.For a given epidemic or pandemic, the average of its estimated death toll range is used for ranking. If the death toll averages of two or more epidemics or pandemics are equal, then the smaller the range, the higher the rank.
The COVID-19 pandemic ranks as the deadliest disaster in the country's history. [43] It was the third-leading cause of death in the U.S. in 2020, behind heart disease and cancer. [ 44 ] From 2019 to 2020, U.S. life expectancy dropped by three years for Hispanic and Latino Americans , 2.9 years for African Americans , and 1.2 years for White ...
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 ...
The timeline of the COVID-19 pandemic lists the articles containing the chronology and epidemiology of SARS-CoV-2, [1] the virus that causes the coronavirus disease 2019 and is responsible for the COVID-19 pandemic. The first human cases of COVID-19 occurred in Wuhan, People's Republic of China, on or about 17 November 2019. [2]
This article contains the number of confirmed COVID-19 deaths per population as of 24 February 2025, by country. It also has cumulative death totals by country. For these numbers over time see the tables, graphs, and maps at COVID-19 pandemic deaths and COVID-19 pandemic by country and territory.
In a March 13, 2020, report "not for public distribution", the United States Department of Health and Human Services (HHS) used the working assumptions for their response plan, that the COVID-19 "pandemic will last 18 months or longer and could include multiple waves of illness", and that resultant "supply chain and transportation impacts ...
"COVID is not going away, and it still causes a substantial amount of illness each year." While the world might not be in a global pandemic anymore, Sean Clarke, a professor of nursing leadership ...