Within-host evolutionary dynamics of seasonal and pandemic human influenza A viruses in young children Por Han, AX, Felix Garza, ZC, Welkers, MR, Vigeveno, RM, Tran, ND, Le, TQM, Pham Quang, T, Dang, DT, Tran, TNA, Ha, MT, Nguyen, TH, Le, QT, Le, TH, Hoang, TBN, Chokephaibulkit, K, Puthavathana, P, Nguyen, VVC, Nghiem, MN, Nguyen, VK, Dao, TT, Tran, TH, Wertheim, HF, Horby, PW, Fox, A, van Doorn, HR, Eggink, D, de Jong, MD, Russell, CA