As long as we, the general public, are almost totally ignorant about biostatistics, we are easy prey for misleading statistics used by pharmaceutical companies and purveyors of medical procedures. So how do we learn about biostatistics without going back to school?
Fortunately, there are knowledgeable folks that want to help us learn. A recommended beginning start is the book Know Your Chances co-authored by Woloshin, Schwartz and Welch. It is very well organized and the authors who are M.D.s and researchers understand the topic.
Here is a graphic of book and a link to the publisher’s page where you can easily download a sample chapter: