brief summary and how it relates to statistics topics

https://www.thelancet.com/journals/laninf/article/PIIS1473-3099(20)30243-7/fulltext

How does the article relate to the statistical subject of statistical inference estimation and hypothesis testing, one-sample z-test, or two-sample z-test, correlation and scatter plots, regression analysis?

You should give a short outline; you should briefly explain why you believe that the specific article is a good candidate for the forum.  Specify the article’s date and source.