Guillaume Federighi (AKA Hey Gee) is a French and American author and illustrator. He began his career in 1998 by exploring the world of street art and graffiti in different European capitals. After moving to New York, Hey Gee developed a reputation for a direct and instantaneous style of graphic design and illustration that brings out unifying ideas, creates distinctive characters, and affects all generations. He is also the owner and creative director of Hey Gee Studio, a full-service creative agency based in New York City. Grace Bowden learned about HPV during a 9th-grade science project for her biomedical science class. During her research, she learned how important vaccines are in protecting against HPV and many other infections. After the COVID-19 pandemic shut down the world, she wanted to use her voice to help people protect themselves by learning about vaccines and getting vaccinated. Creative and high-spirited, Grace loves swimming, plays three instruments and sings in choir, and has a passion for writing. Medical editor Dr. Robert Jacobson is a pediatrician and infectious disease expert at Mayo Clinic in Rochester, Minnesota, with special expertise in childhood and adolescent vaccines and immunization. He serves as the medical director for the Population Health Science Program at Mayo Clinic's Robert D. and Patricia E. Kern Center for the Science of Health Care Delivery, and he also leads Mayo's Employee and Community Health Research Initiative. His areas of research include population health sciences, such as practical ways to improve vaccination rates.