Table 2.

 Estimates of the initial reproduction number, R, for the four time series S, C, A and N (introduced in the text) before and after public health alerts (19 April and 25 April, respectively). The mean and the 95% confidence interval range reported in this table are derived from Figure 4.

Time Series	Mean R (95% CI range) (estimated on 19 April 2009)	Mean R (95% CI range) (estimated on 25 April 2009)
Suspect (early time series)	1·51 (1·32–1·71)	2·04 (1·84–2·25)
Confirmed	1·43 (1·29–1·57)	2·26 (2·01–2·49)
N_adjusted confirmed (inflated)	1·43 (1·29–1·57)	1·32 (1·20–1·43)
N_adjusted confirmed (deflated)	1·43 (1·29–1·57)	1·32 (1·20–1·43)
A_adjusted confirmed (inflated)	1·43 (1·29–1·57)	1·44 (1·38–1·51)
A_adjusted confirmed (deflated)	1·43 (1·29–1·57)	1·44 (1·38–1·51)