CD274 and Epstein-Barr virus infection: Given that the immune response to EBV infection is significantly different between adults and children, considering that in Argentina the incidence of EBV-associated tumors increases when it comes to pediatric patients, and that the role of macrophages in the control of EBV infection and tumorigenesis is still poorly explored, our aim was to evaluate the influence of EBV in macrophages’ PD-L1 expression in pediatric patients to more deeply understand its viral contribution to lymphomagenesis.