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US influenza statistics by flu season. From the Centers for Disease Control and Prevention page called "Disease Burden of Flu": "Each year CDC estimates the burden of influenza in the U.S. CDC uses modeling to estimate the number of flu illnesses, medical visits, hospitalizations, and deaths related to flu that occurred in a given season.
Deaths per 100,000 persons in each age group, United States, for the interpandemic years 1911–1917 (dashed line) and the pandemic year 1918 (solid line). [ 79 ] From 1918 to 1920, the Spanish flu pandemic became the most devastating influenza pandemic and one of the deadliest pandemics in history.
In 2003, the WHO estimated that the cost of flu epidemics in the United States was US$71–167 billion per year. [32] A 2007 study found that annual influenza epidemics in the US result in approximately 600,000 life-years lost , 3 million hospitalized days, and 30 million outpatient visits, resulting in medical costs of $10 billion annually.
According to preliminary burden estimates for the 2019–2020 flu season (October 1, 2019 through April 4, 2020) there were between 39 and 56 million flu cases; 18–26 million doctor visits; 410,000 to 740,000 hospitalizations, and between 24,000 and 62,000 deaths.
This is a timeline of influenza, briefly describing major events such as outbreaks, epidemics, pandemics, discoveries and developments of vaccines.In addition to specific year/period-related events, there is the seasonal flu that kills between 250,000 and 500,000 people every year and has claimed between 340 million and 1 billion human lives throughout history.
The 2017–2018 flu season was severe for all US populations and resulted in an estimated 41 million cases, 710,000 hospitalizations and 52,000 deaths. This is the highest number of illnesses since the 2009 flu season, when there were an estimated 60 million cases. [ 6 ]
Deaths from the Spanish flu pandemic in the United States (1 C, 1 P) Pages in category "Deaths from influenza in the United States" The following 13 pages are in this category, out of 13 total.
H5N1 influenza virus is a type of influenza A virus which mostly infects birds. H5N1 flu is a concern due to the its global spread that may constitute a pandemic threat. The yardstick for human mortality from H5N1 is the case-fatality rate (CFR); the ratio of the number of confirmed human deaths resulting from infection of H5N1 to the number of those confirmed cases of infection with the virus.