In this book, early fluent readers will learn about the life, accomplishments, and contributions of biochemist Katalin Karikó. A Take a Look! infographic explain how mRNA vaccines help our immune systems, sidebars present interesting, supplementary information, and an activity offers readers an opportunity to extend learning. Children can learn more about Katalin Karikó using our safe search engine that provides relevant, age-appropriate websites. Katalin Karikó also features reading tips for teachers and parents, a table of contents, a glossary, and an index. Katalin Karikó is part of Jump!'s Women in STEM series.