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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.
An influenza pandemic is an epidemic of an ... for the interpandemic years 1911–1917 (dashed line) and the pandemic year 1918 (solid line). ... Timeline of ...
1957–1958 influenza pandemic: Influenza A/H2N2: 1–4 million – 1957–1958 Worldwide 12 Hong Kong flu: Influenza A/H3N2: 1–4 million – 1968–1969 Worldwide 10 1918–1922 Russia typhus epidemic: Typhus: 2–3 million 1–1.6% of Russian population [14] 1918–1922 Russia: 13 Cocoliztli epidemic of 1576: Cocoliztli 2–2.5 million
Generally after each influenza pandemic, the pandemic strain continues to circulate as the cause of seasonal influenza, replacing prior strains. [1] From 1700 to 1889, influenza pandemics occurred about once every 50–60 years.
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.
"The flu, before the COVID pandemic, killed between 35,000 and 50,000 persons in the U.S. each year, usually about 200 children and the rest older persons, often with pre-existing conditions ...
The H1N1 flu pandemic of 1918 killed more than 50 million people over three years, or less than 3% of those infected. By comparison, of those infected with H5N1, more than half of them died.
In June 2010, a team at the Mount Sinai School of Medicine reported the 2009 flu pandemic vaccine provided some cross-protection against the Spanish flu pandemic strain. [369] One of the few things known for certain about influenza in 1918 and for some years after was that it was, except in the laboratory, exclusively a disease of human beings ...