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=== Fatality rate === | === Fatality rate === | ||
[[File:EUoN3NhWsAAkx4M.png_large.png|thumb|right|300px]] | [[File:EUoN3NhWsAAkx4M.png_large.png|thumb|right|300px]] | ||
Some of the best data sources for the infected fatality rate (IFR) comes from the [[boomer]] cruise ship Diamond Princess. Out of 3,711 passengers with an average age of 60, about 20% (712) tested positive. Only | Some of the best data sources for the infected fatality rate (IFR) comes from the [[boomer]] cruise ship Diamond Princess. | ||
This suggests | Out of 3,711 passengers with an average age of 60, about 20% (712) tested positive. Only 25% of the positive cases had symptoms of a pneumonia and 1.7% (12) died.<ref name="basedthread">https://www.reddit.com/r/COVID19/comments/fno919/nonsevere_vs_severe_symptomatic_covid19_104_cases/</ref> | ||
This suggests an IFR for the overall population of around 0.5%.<ref name="basedsite">https://www.cebm.net/covid-19/global-covid-19-case-fatality-rates/</ref> | |||
This IFR would make the disease still several times as deadly as the common flu<ref name="basedsite"></ref> and | Antibody testing in a German city found an IFR of 0.37%.<ref>https://www.reddit.com/r/COVID19/comments/fxp6ux/heinsberg_covid19_caseclusterstudy_initial_results/</ref> But the overall IFR will vary based on the prevalence of old and fat people.<ref>https://www.medrxiv.org/content/10.1101/2020.04.05.20054361v1</ref><ref>https://onlinelibrary.wiley.com/doi/abs/10.1002/oby.22831</ref> | ||
This IFR would make the disease still several times as deadly as the common flu,<ref name="basedsite"></ref> and the course of disease is more severe with three times longer hospitalization than the flu.<ref>https://archive.is/js5bL</ref> Moreover, the disease is mild among the young and overall immunity is low, enabling quick spread. Together, this explains how the outbreak lead to overwhelmed to hospitals in various places. | |||
In Italy, the average fatality age was 81 | In Italy, the average fatality age was 81. More than 99% of deaths were older than 50 and 99% had an existing underlying condition.<ref name="baseditaly">https://www.epicentro.iss.it/coronavirus/bollettino/Report-COVID-2019_20_marzo_eng.pdf</ref> Half of the fatalities had three or more chronic diseases,<ref name="baseditaly"></ref> so more than half of the fatal cases would presumably have died in the next few years anyhow. Further, despite extremely overwhelmed hospitals, there were close to ''zero'' fatalities younger than 30,<ref name="baseditaly"></ref><ref>https://www.cebm.net/covid-19/global-covid-19-case-fatality-rates</ref> different from the Spanish Flu.<ref>https://en.wikipedia.org/wiki/Spanish_flu</ref> | ||
In addition, Italy has a history of overwhelmed hospitals during flu season, e.g. in 2017/2018, Italian hospitals delayed surgery and rationed care due to the flu.<ref>https://milano.corriere.it/notizie/cronaca/18_gennaio_10/milano-terapie-intensive-collasso-l-influenza-gia-48-malati-gravi-molte-operazioni-rinviate-c9dc43a6-f5d1-11e7-9b06-fe054c3be5b2.shtml?refresh_ce-cp</ref> | In addition, Italy has a history of overwhelmed hospitals during flu season, e.g. in 2017/2018, Italian hospitals delayed surgery and rationed care due to the flu.<ref>https://milano.corriere.it/notizie/cronaca/18_gennaio_10/milano-terapie-intensive-collasso-l-influenza-gia-48-malati-gravi-molte-operazioni-rinviate-c9dc43a6-f5d1-11e7-9b06-fe054c3be5b2.shtml?refresh_ce-cp</ref> | ||