Authors: Hay, A Gust, I Hampson, A Nerome, K Lim, W Chan, M Saw, TA Mak, KH Canas, L Guo, Y

Citation: A. Hay et al., Update: Influenza activity - United States and worldwide, 1998-99 season, and composition of the 1999-2000 influenza vaccine (Reprinted from MMWR, vol 48, pg 374, 1999), J AM MED A, 281(23), 1999, pp. 2178-2180