https://www.cdc.gov/mmwr/volumes/70/wr/pdfs/mm7034e5-H.pdf
在第一页下方
On July 25, the SARS-CoV-2 infection rate among unvaccinated persons was 4.9 times and the hospitalization rate was 29.2 times the rates among fully vaccinated persons.
还没找到那个28倍呢，接着挖
第四页
Summary
What is already known about this topic?
Although COVID-19 vaccines are highly effective, some fully vaccinated persons will be infected with SARS-CoV-2.
What is added by this report?
During May 1–July 25, 2021, among 43,127 SARS-CoV-2 infections in residents of Los Angeles County, California,
10,895 (25.3%) were in fully vaccinated persons, 1,431 (3.3%) were in partially vaccinated persons, and 30,801 (71.4%) were in unvaccinated persons. On July 25, infection and hospitalization rates among unvaccinated persons were 4.9 and 29.2 times, respectively, those in fully vaccinated persons. In July, when the Delta variant was predominant, cycle threshold values were similar for unvaccinated, partially vaccinated, and vaccinated persons.
What are the implications for public health practice?
Efforts to enhance COVID-19 vaccination coverage, in coordina- tion with other prevention strategies, are critical to preventing COVID-19–related hospitalizations and deaths.
黑字部份就是了，讲未免的住院率是全免的29.2倍。等同于中文说法的“高”28倍。
这是基本的算术表达方法：
问A是B的多少倍，直接用A除B；
问A比B高（或大）多少倍，要（A-B）/B。
注意，上面文中提到的数据，是某一天的即时数据。没有单独列出表格、提供原始数据，只有分析结果。非常不专业，很难想象CDC养了一群啥玩艺儿。
至此，完成此次挖矿仼务。吐血恢复中，要睡一觉补回来。
