Early mucosal events promote distinct mucosal and systemic antibody responses to live attenuated influenza vaccine by Thwaites, RS, Uruchurtu, ASS, Negri, VA, Cole, ME, Singh, N, Poshai, N, Jackson, D, Hoschler, K, Baker, T, Scott, IC, Ros, XR, Cohen, ES, Zambon, M, Pollock, KM, Hansel, TT, Openshaw, PJM