Hermes is a young dragon who is scared to go to the doctor. When his mom, Zacharenia, tells him that they need to go to the dragons' hospital for him to get vaccinated, he tries to avoid that. But on the way, he will learn about the necessary use of vaccines in our lives as well as about the basic rules of hygiene that we all should apply in our daily life so that we're healthy and safe from microbes. "The Dragon Doctor" is the second book in the professions series and teaches in a smart and fun way the benefits of vaccination and the rules of hygiene that protect both our own health and that of people around us.