Over the last century, public health has become central to medical knowledge due to major scientific advances against infectious diseases. Art has historically played a key role in health education, translating complex medical concepts into emotionally engaging visual messages—from early anti-tuberculosis and malaria posters to modern graphic medicine used during the HIV and Covid-19 pandemics. This study aims to describe the intersection of art, advertising, and U.S. preventive medicine through the lifework of the celebrated children's author and cartoonist Theodor Seuss Geisel, better known as Dr. Seuss. The study utilized an integrated approach. The authors manually searched and reviewed scientific databases (such as PubMed and Google Scholar) without time or language restrictions. Simultaneously, they screened historical records along with Dr. Seuss’s books and collections. The retrieved references were analyzed in a two-stage process: an initial review of titles and abstracts, followed by a full-text evaluation of the relevant articles. Famous primarily for his children's literature, Dr. Seuss was also an accomplished satirist and commercial illustrator who significantly contributed to U.S. preventive medicine. His early career included a prominent 17-year advertising campaign for "Flit" insect repellent to promote pest control. During World War II, he designed the 1943 military handout "This is Ann" and various posters, utilizing humor and visual metaphors to teach servicemen how to prevent malaria using nets and repellents instead of relying on boring traditional military manuals. The proven success of using humor and beloved characters in public health communication led the Centers for Disease Control and Prevention (CDC) to adopt Dr. Seuss's work. In the 1990s, the CDC featured iconic characters like the Cat in the Hat alongside Seussian rhymes on immunization posters. This integration demonstrates that combining art and entertainment remains an effective, long-term strategic tool to reduce vaccine hesitancy and promote crucial preventive behaviors.