The five functions and their frequencies across the data.

The five functions and their frequencies across the data.</p

Factors associated with the incubation period.

<p>Factors associated with the incubation period.</p

Age stratified analysis of association between risk of death and estimated incubation period, sex, location and underlying condition.

<p>Age stratified analysis of association between risk of death and estimated incubation period, sex, location and underlying condition.</p

Parametric estimates of the incubation period distribution for fatal (dotted line) and non-fatal cases (solid line) of laboratory-confirmed influenza A(H7N9) virus infection.

<p>The parameters of the weibull distribution were estimated with the MCMC approach in the fatal and non-fatal cases, respectively. The estimates are for fatal cases: k = 2.30 (95% CrI: 1.80, 2.89) and θ = 4.21 (95% CrI: 3.62, 4.85) and for non-fatal cases: k = 2.03 (95% CrI: 1.62, 2.52) and θ = 3.74 (95% CrI: 3.20, 4.36).</p

Factors associated with risk of death.

<p>Factors associated with risk of death.</p

Parametric (Weibull) and nonparametric estimates (Turnbull) of the distribution of incubation periods for human avian influenza A(H7N9) virus infections for fatal cases (above) and non-fatal cases (below).

<p>Parametric (Weibull) and nonparametric estimates (Turnbull) of the distribution of incubation periods for human avian influenza A(H7N9) virus infections for fatal cases (above) and non-fatal cases (below).</p

Backyard poultry^* raising among 1,053 households in Xiuning County, China, 2007.

<p>*Including chicken, ducks, geese and other domestic birds.</p>†<p>Denominators smaller than the complete sample were indicated.</p

Frequency of live poultry market visits among 2,058 residents in Shenzhen, China, 2007.

<p>*Standardized number of visiting per unit time: 1 was attributed to reporting ≤1 live poultry market visit per year; 4 to reporting 3–5 times/year; 8 to reporting 6–11 times/year; 24 to reporting 1–3 times/month; 52 to reporting 1–2 times/week; 208 to reporting 3–5 times/week; and 365 to those reporting ≥1/day annually.</p>§<p>The average annual household visits was weighted by age and sex based on the National Census in 2000.</p

Number and percent of influenza positive by type/subtype and by month of illness onset among adults (aged ≥15 years) hospitalized with severe acute respiratory infection (n = 1,790), Jingzhou, China, April 5, 2010 to April 8, 2012.

<p>Number and percent of influenza positive by type/subtype and by month of illness onset among adults (aged ≥15 years) hospitalized with severe acute respiratory infection (n = 1,790), Jingzhou, China, April 5, 2010 to April 8, 2012.</p

Influenza test results among adults (aged ≥15 years) hospitalized with severe acute respiratory infection (N = 1,790) by date of illness onset, Jingzhou, China, April 5, 2010 to April 8, 2012.

<p>Influenza test results among adults (aged ≥15 years) hospitalized with severe acute respiratory infection (N = 1,790) by date of illness onset, Jingzhou, China, April 5, 2010 to April 8, 2012.</p