Age-seroprevalence curves for the multi-strain structure of influenza A virus by Vinh, DN, Nhat, NTD, de Bruin, E, Vy, NHT, Thao, TTN, Phuong, HT, Anh, PH, Todd, S, Quan, TM, Thanh, NTL, Lien, NTN, Ha, NTH, Hong, TTK, Thai, PQ, Choisy, M, Nguyen, TD, Simmons, CP, Clapham, HE, Thwaites, GE, Chau, NVV, Koopmans, M, Boni, MF