Who among us hasn't at some point in their lives, gotten a vaccine, for themselves or for their loved ones? And yet, who among us doesn't still have many questions about vaccines? To help us understand what's at stake, individually and as a society, this book clearly and accessibly lays out how vaccines work, their role, their virtues, and their limits. Drawing on the latest research, it enables readers to make a more informed assessment of the risks and benefits of vaccination.