SARS-CoV-2-specific circulating T follicular helper cells correlate with neutralizing antibodies and increase during early convalescence. - Boppana S; Qin K; Files JK; Russell RM; Stoltz R; Bibollet-Ruche F; Bansal A; Erdmann N; Hahn BH; Goepfert PA (PLoS pathogens, 2021)