Markel's work here is not just about what the title proclaims--and in fact, I imagine that's led to some disappointed readers--instead, it is as much about history, immigration into America, and fear as it is about disease, science, or epidemics. Yet, in bringing all of these topics together, it's a powerful look into the subjects and into the way populations have come to understand a variety of diseases which we're still working against today.
By splitting the book into six different chapters to match up with six separate diseases, Markel works to first explain a disease and where it actually may have begun (or sometimes, where it definitely didn't begin, despite popular thought), and then to dissect the understanding that culture came to about the same -- often, the understandings don't match up with history or truth, of course. And through case studies and discussions of how truth has been twisted or scarred in relation to each disease, many things become clearer, from why the popular understanding might have been shaped to allow for (or even promote) xenophobia and prejudice, on to what contemporary readers might best understand and fear about a disease, as opposed to what popular history or culture might suggest.
If there is a failing here, it's that Markel doesn't attempt (in more than an occasional sentence) to address whether America is like other nations (any or all) in its propensity to blame epidemics on immigrants, or whether this is a uniquely American pattern of thought. In some chapters, there are discussions of other nations/peoples blaming a given disease on another group, but the topic isn't addressed as a whole. In some ways, this is forgivable simply because Markel is admittedly an American historian, and may have felt this topic to be a far reach, but it does feel like something of a missing discussion. Also, the title and subtitle are, as suggested above, a bit misleading.
This book is as much about immigration and prejudice as it is about disease, and it is as much about the making of America as it is about epidemics. Some readers will come to this book for particular insights, based on the title, and perhaps be disappointed. Readers looking for a wider scope of understanding, though, may end up being more than pleased.
Absolutely, I'd recommend it.