The interaction between dendritic cells (DCs) and T follicular helper (Tfh) cells plays a pivotal role in the initiation of germinal center (GC) reactions for humoral immunity against infection. Center for Viral Immunology is dedicated to uncovering pioneering insights into germinal center reactions during viral immune responses. Building upon these fundamental discoveries, we also aim to leverage this knowledge for practical applications, such as the enhancement of vaccine efficacy.