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EDIT: It was pointed out below that what they measured is IFR (= deaths / infections), not CFR (= deaths / clinically diagnosed cases). The figure of 0.37% shouldn't be compared to the CFR of influenza as it includes asymptomatic and non-diagnosed cases. The IFR of influenza is lower than 0.1%, somewhere between 0.02% and 0.06% depending on what estimate for the percentage of asymptomatic cases one follows. Its higher lethality is also not what makes COVID-19 so dangerous. The main issue is the burden on health infrastructure caused by the long time severe cases spend in ICU, requiring mechanical ventilation. Another issue is the extreme reproduction rate which requires clinical personnel to take extreme precaution when it comes to PPE.
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