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Table 4 Estimates and 95% confidence intervals (CI) of R 0 for the 2009 pH1N1 in Mexico with different lengths of infectious period (1/γ), proportions of asymptomatic infections (θ), average duration of stays (d), and trends of travel rates

From: A statistical method utilizing information of imported cases to estimate the transmissibility for an influenza pandemic

   1/γ = 3 days 1/γ = 2 days 1/γ = 4 days
Settings   \( {\widehat{R}}_0 \) 95% CI \( {\widehat{R}}_0 \) 95% CI \( {\widehat{R}}_0 \) 95% CI
Uniformly travels d = 3 days θ = 30% 1.69 (1.65, 1.73) 1.45 (1.42, 1.48) 1.94 (1.88, 1.99)
θ = 10% 1.67 (1.63, 1.70) 1.44 (1.41, 1.46) 1.91 (1.86, 1.95)
θ = 50% 1.73 (1.69, 1.78) 1.48 (1.44, 1.51) 1.99 (1.93, 2.06)
d = 5 days θ = 30% 1.66 (1.62, 1.70) 1.43 (1.40, 1.45) 1.90 (1.84, 1.95)
θ = 10% 1.64 (1.60, 1.67) 1.41 (1.39, 1.44) 1.86 (1.81, 1.91)
θ = 50% 1.70 (1.65, 1.74) 1.45 (1.42, 1.48) 1.95 (1.88, 2.01)
Decreasing travels d = 3 days θ = 30% 1.70 (1.66, 1.74) 1.46 (1.43, 1.48) 1.95 (1.89, 2.00)
θ = 10% 1.68 (1.64, 1.71) 1.44 (1.41, 1.46) 1.92 (1.87, 1.96)
θ = 50% 1.74 (1.69, 1.79) 1.48 (1.45, 1.51) 2.00 (1.93, 2.06)
d = 5 days θ = 30% 1.68 (1.63, 1.71) 1.43 (1.40, 1.46) 1.90 (1.85, 1.96)
θ = 10% 1.64 (1.60, 1.68) 1.42 (1.39, 1.44) 1.87 (1.82, 1.92)
θ = 50% 1.70 (1.66, 1.75) 1.46 (1.43, 1.49) 1.95 (1.89, 2.01)