B cell imprinting in children impairs antibodies to the haemagglutinin stalk - Jiayi Sun; Gyunghee Jo; Chloe A. Troxell; Yanbin Fu; Robert Hoezl; Huibin Lv; Hassanein H. Abozeid; Qi Wen Teo; Tossapol Pholcharee; Joshua J. C. McGrath; Siriruk Changrob; Sean A. Nelson; et al. (Nature, 2026)