Table 1. Estimation results using the weekly excess influenza case data in 2009 over the weekly average of 2004-2008 by reporting date during weeks 5–9 for Mexico City and during weeks 5-14 for all of Mexico.
| Location(Time Period) | Turning point ti(95% C.I.) | Growth rate r(95% C.I.) | Cumulative case number K (95% CI) | R0(95% C.I.) |
| Mexico City(weeks 5-9) | 1.461(0*, 17.73) | 1.69(0*, 12.94) | 110(64, 160) | 1.59(0.55, 2.62) |
| All of Mexico(weeks 5-14) | 3.562(0.0, 13.29) | 0.81(0*, 2.31) | 246(203, 289) | 1.25(0.76, 1.74) |
1
Denoting turning point during week 7 (February 15–21).
2
Denoting turning point during week 9 (March 1–7).
*max(0, lower bound).
Note that the cumulative case number is rounded off to the nearest integer. The actual cumulative excess number K for weeks 5–9 in Mexico City is 100 and for weeks 5–14 is 226 in all of Mexico. R0 was computed using the mean estimated generation interval of T = 1.91 days (95% CI: 1.30–2.71), which was estimated from early Mexico novel H1N1 data in La Gloria before April 30, 2009 [3].