When she was young, Katalin Karikó decided she would study science—even though she had never met a scientist! But she was determined to take in as much information about science as she could, and once she made a decision, she stuck with it. And she eventually became a doctor. After facing many challenges, including having to learn English at university, lack of research funding and harsh immigration policies, Kati and her family left Hungary and moved to America. There was just one problem—no one else believed her. Then the COVID-19 pandemic hit, and Kati and her research were thrust into the spotlight. But with her unshakable will, she was ready to face the challenge and knew that she would be able to fight this virus...and win.