When Hudson catches a Mystery Bug, Juliette's journey of discovery begins. She learns essential hygiene skills, masking, social-distancing and how vaccines rally the body's defenses to keep Mystery Bugs at bay.Here, under one cover are Colleen and Terry Shepherd's beloved stories, "Juliette and the Mystery Bug," "Juliette and the Masked Hero," and the all new "Juliette and the Vaccine." Based on guidance from the Centers for Disease Control, beautifully...