https://www.cdc.gov/mmwr/volumes/70/wr/pdfs/mm7034e5-H.pdf
在第一頁下方
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.
還沒找到那個28倍呢，接著挖
第四頁
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，講未免的住院率是全免的29.2倍。等同於中文說法的“高”28倍。
這是基本的算術表達方法：
問A是B的多少倍，直接用A除B；
問A比B高（或大）多少倍，要（A-B）/B。
注意，上麵文中提到的數據，是某一天的即時數據。沒有單獨列出表格、提供原始數據，隻有分析結果。非常不專業，很難想象CDC養了一群啥玩藝兒。
至此，完成此次挖礦仼務。吐血恢複中，要睡一覺補回來。
