US Hawks Hang Gliding Association

Wikipedia wrote:Coronavirus disease 2019 (COVID-19) is an infectious disease caused by the virus strain severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). Worldwide spread of the disease began for the first time in 2019 and has developed into the 2019–20 coronavirus pandemic. Common symptoms include fever, cough, and shortness of breath. Muscle pain, sputum production and sore throat are some of the less common symptoms. While the majority of cases result in mild symptoms, some progress to pneumonia and multi-organ failure. The case fatality rate is estimated at between 1% and 5% but varies by age and other health conditions.

brianscharp wrote:https://www.businessinsider.com/coronavirus-testing-covid-19-tests-per-capita-chart-us-behind-2020-3

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Hence, the question remains why the age distribution of cases is shaped so differently in Italy compared to South Korea. It has also been pointed out that the testing procedures for coronavirus in the countries are very different — Italy has predominantly been testing people with symptoms of a coronavirus infection, while South Korea has been testing basically everyone since the outbreak had become apparent. Consequently, South Korea has detected more asymptomatic, but positive cases of coronavirus than Italy, in particular among young people.

The bottom line is that the coronavirus hit Italy and South Korea very differently in terms of age at around the same time and the same level of the outbreak — at least the level that we noticed in terms of confirmed cases — thereby causing a much higher number of deaths in Italy. An implication is that simply tracing the number of confirmed coronavirus cases by country over time, as many graphs and website currently do, is not telling the full story. The raw number of cases is a rather poor predictor of deaths by COVID-19, at least in the short-run. If the virus spreads predominantly among young people, as appears to have been the case in South Korea, there is no immediate risk of collapse to the hospitals. However, if it spreads to the old population, as in Italy, collapse is looming; and it might be a matter of days. When (not if) this happens is another factor that is hard to predict, as some efforts are underway.