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This has led to speculation that the Spanish flu pandemic originated in China, [190] [191] as the lower rates of flu mortality may be explained by the Chinese population's previously acquired immunity to the flu virus. [174] [190] In the Guangdong Province it was reported that early outbreaks of influenza in 1918 disproportionately impacted ...
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.
Case fatality rate. In epidemiology, case fatality rate (CFR) – or sometimes more accurately case-fatality risk – is the proportion of people who have been diagnosed with a certain disease and end up dying of it. Unlike a disease's mortality rate, the CFR does not take into account the time period between disease onset and death.
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.
List of Spanish flu cases. The 1918–1920 flu pandemic is commonly referred to as the Spanish flu, and caused millions of deaths worldwide. To maintain morale, wartime censors minimized early reports of illness and mortality in Germany, the United Kingdom, France, and the United States. [ 1][ 2] Papers were free to report the epidemic's ...
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 ...
Spanish flu research. An electron micrograph of the virus that caused the 1918 flu. ... Look for "/1918" on the full list of H1N1 strains. Spanish flu research concerns studies regarding the causes and characteristics of the Spanish flu, a variety of influenza that in 1918 was responsible for the worst influenza pandemic in modern history.
The Spanish flu pandemic was truly global, spreading even to the Arctic and remote Pacific islands. The unusually severe disease killed between 10 and 20% of those infected, as opposed to the more usual flu epidemic mortality rate of 0.1%.