This volume brings together the skills and protocols of numerous laboratories that are at the heart of investigation into the biology of Tfh cells in both mice and humans. As a volume in the highly successful Methods in Molecular Biology series, chapters contain introductions to their respective topics, lists of the necessary materials and reagents, step-by-step, readily reproducible protocols, and tips on troubleshooting and avoiding known pitfalls. Concise and easy-to-use, T follicular Helper Cells: Methods and Protocols provides scientist with techniques and protocols that have facilitated breakthroughs in Tfh biology and to present them in a way that will enable both new and experienced researchers to continue to move this exciting field forward.