Obviously vaccines have been in the news a lot recently, and are a topic of concern for the world right now. Statistics play a large role in studying vaccines, in particular in the process of approving them for use and understanding what risks and benefits are involved in administering vaccines to a large population.

Here are a couple links that are worth reading about this important topic:

Here is an excerpt from the NYT article explaining vaccine efficacy:

Vaccine efficacy explained (NYT, 3 March 2021)

and later in the article is this passage: