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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.
From 1962 to 2022 there have been 157 recorded cases of the infection in United States, only 4 of those 157 individuals survived the disease. A combination of drugs have shown effectiveness in survivors. The rate drops significantly to >50% with treatment. The rate dropped significantly to 10% with effective treatments. Eradicated.
United States influenza statistics by flu season. 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 ...
Frequency. 3–5 million severe cases per year [1][2] Deaths. >290,000–650,000 deaths per year [3][4] Influenza, commonly known as " the flu " or just " flu ", is an infectious disease caused by influenza viruses. Symptoms range from mild to severe and often include fever, runny nose, sore throat, muscle pain, headache, coughing, and fatigue.
By contrast, flu cases are skyrocketing. The national share of influenza tests that came back positive rose from around 8% in the week ending Oct. 30 to nearly 15% in the week ending Nov. 13. Flu ...
Also, in the US the flu season usually accounts for 200,000 hospitalizations and 41,000 deaths. [citation needed] Because the mortality rate of the H1N1 swine flu is lower than that of common flu strains, this [clarification needed] number was actually lower in 2009.
Influenza (flu) The Centers for Disease Control and Prevention (CDC) estimates that, as of April 4, 2020, the 2019–2020 United States flu season had caused 39 million to 56 million flu illnesses, 410,000 to 740,000 hospitalizations and 24,000 to 62,000 deaths. [1] In January 2020, the Director of the National Institute of Allergies and ...
The 1918–1920 flu pandemic, also known as the Great Influenza epidemic or by the common misnomer Spanish flu, was an exceptionally deadly global influenza pandemic caused by the H1N1 subtype of the influenza A virus. The earliest documented case was March 1918 in the state of Kansas in the United States, with further cases recorded in France ...