We also fit the weekly confirmed pH1N1 hospitalization data by hospitalization week in Taiwan from eweek 29 (7/12-7/18) of 2009 to e-week 12 (3/21-3/27) of 2010 to the Richards model. The results are given in Table 2 . The data also fit a two-phase Richards model with the first wave spanning e-weeks 27-39 (7/12/09-9/ 26/09) of 2009 and the second wave from e-week 39 (9/ 20-9/26) of 2009 to e-week-12 (9/27/09-3/27/10) of 2010 ( Figure 3) .