意大利为何死亡率如此高？
- smallox
意大利人口老龄化最严重，死者平均年龄81.4
https://www.scientificamerican.com/article/why-deaths-from-coronavirus-are-so-high-in-italy/
One factor affecting the country’s death rate may be the age of its population—Italy has the oldest population in Europe, with about 23% of residents 65 or older, according toThe New York Times. The median age in the country is 47.3, compared with 38.3 in the United States, the Times reported. Many of Italy’s deaths have been among people in their 80s, and 90s, a population known to be more susceptible to severe complications from COVID-19, according toThe Local.
The health ministry says the average age of deaths from the coronavirus is 81.4 years.
https://www.bbc.com/news/world-europe-51805727
美国死者平均年龄80
US Surgeon General Jerome Adams said cases would rise, adding the average age of death for people with the virus was 80, and the average age of those needing medical attention was 60.
- smallox死亡率和测试率的紧密关系。
Testing rates
The biggest effect on the percentage death rate is how many people each country tests.
Around 80 percent of people with coronavirus only get mild symptoms and many of them will probably not go to the doctor. Coronavirus is of the same family as colds and flu with several similar symptoms, so many cases may be going misdiagnosed.
A country that only tests the people who end up seriously ill will end up having a high death rate. If, however, there is widespread testing that identifies people who have the virus but only have mild symptoms then the death rate as a percentage becomes much lower.
The World Health Organisation is currently estimating the worldwide death rate at about 3.5 percent while France's death rate stands nearer 1.8 percent - but the international figure includes countries that do not have widespread testing in place.
Italy's death rate, based on a calculation of deaths per number of confirmed cases has been over the 6 percent mark, while Germany's is as low as 0.2 percent.
Spain, which has had 47 deaths and over 2,000 cases is around 2.3 percent.
These calculations obviously don't tell the true picture, because they depend on the number of confirmed cases and therefore on each country's policy of testing.
Many coronavirus cases will simply have gone undetected.