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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. For the historical records of major changes in the world population, see world population. [3]
The term pandemic had not been used then, but was used for later epidemics, including the 1918 H1N1 influenza A pandemic—more commonly known as the Spanish flu—which is the deadliest pandemic in history. The most recent pandemics include the HIV/AIDS pandemic, the 2009 swine flu pandemic and the COVID-19 pandemic. Almost all these diseases ...
The worst epidemics and pandemics have ravaged humanity throughout its existence, but which were the deadliest? Some of the worst epidemics and pandemics in history have doomed whole civilizations ...
Human infectious diseases may be characterized by their case fatality rate (CFR), the proportion of people diagnosed with a disease who die from it (cf. mortality rate).It should not be confused with the infection fatality rate (IFR), the estimated proportion of people infected by a disease-causing agent, including asymptomatic and undiagnosed infections, who die from the disease.
The 1918 flu pandemic (Spanish flu) is a deadly pandemic involving the Influenza A virus subtype H1N1 that infected over 500 million people all over the world, predominantly affecting healthy young individuals. [27] [28] Influenza: France (origin, possibly disputed) 1922: Organization
A world map illustrating the proportion of population infected with HIV in 2019. HIV/AIDS was first identified as a disease in 1981, and is an ongoing worldwide public health issue. [67] [68] Since then, HIV/AIDS has killed an estimated 40 million people with a further 630,000 deaths annually; 39 million people are currently living with HIV ...
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The first confirmed human case in the United States was on 19 January 2020. The World Health Organization declared the COVID-19 outbreak a Public Health Emergency of International Concern (PHEIC) on 30 January 2020, and first referred to it as a pandemic on 11 March 2020. [3] [4] The WHO ended the PHEIC on 5 May 2023. [5]