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The cost of a flu season in lives lost, medical expenses and economic impact can be severe. In 2017, the World Health Organization (WHO) estimated that the seasonal flu causes 290,000 to 650,000 annual deaths worldwide. [31] In 2003, the WHO estimated that the cost of flu epidemics in the United States was US$71–167 billion per year. [32]
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.
Most flu vaccines are inactivated and administered via intramuscular injection. LAIVs are sprayed into the nasal cavity. [1] Vaccination recommendations vary by country. Some recommend vaccination for all people above a certain age, such as 6 months, [46] whereas other countries limit recommendations to high-risk groups.
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 1889–1890 pandemic, often referred to as the Asiatic flu [53] or Russian flu, killed about 1 million people [54] [55] out of a world population of about 1.5 billion. It was long believed to be caused by an influenza A subtype (most often H2N2), but recent analysis largely brought on by the 2002-2004 SARS outbreak and the COVID-19 pandemic ...
1957–1958 influenza pandemic ('Asian flu') 1957–1958 Worldwide Influenza A virus subtype H2N2: 1–4 million [187] [203] [204] 1960–1962 Ethiopia yellow fever epidemic 1960–1962 Ethiopia: Yellow fever: 30,000 [205] Seventh cholera pandemic: 1961–present Worldwide Cholera (El Tor strain) 36,000 [citation needed] [206] Hong Kong flu ...
For the 1918 flu, people infected numbers (500 million), mortality rate (2~3%) contradict the deaths worldwide "20–100 million" statements. Review needed. Lead: Johnson NPAS, Mueller (2002).
1918 flu pandemic in India; 1957–1958 influenza pandemic; 1977 Russian flu; 1998 Winter Olympics flu epidemic; 2008 H5N1 outbreak in West Bengal; 2009 swine flu pandemic; 2015 United States H5N2 outbreak