Smallpox Manifestations and Survival during the Boston Epidemic of 1901 to 1903

Figure 6. Survival stratified by vaccination status ( = 0.005) ( ); type of vaccination (global = 0.012; = 0.005 for successful vs. none; = 0.034 for recent primary vs. none) ( ); disease severity ( < 0.001) ( ); and age (global = 0.015; = 0.008 for patients younger than 5 years of age vs. patients 5 years of age or older and younger than 45 years of age; = 0.048 for patients 45 years of age or older vs. patients 5 years of age or older and younger than 45 years of age) ( ). Symbols indicate deaths, and the numbers of patients at risk are indicated at 7-day intervals along the x-axis.
Figure 6. Survival stratified by vaccination status ( = 0.005) ( ); type of vaccination (global = 0.012; = 0.005 for successful vs. none; = 0.034 for recent primary vs. none) ( ); disease severity ( < 0.001) ( ); and age (global = 0.015; = 0.008 for patients younger than 5 years of age vs. patients 5 years of age or older and younger than 45 years of age; = 0.048 for patients 45 years of age or older vs. patients 5 years of age or older and younger than 45 years of age) ( ). Symbols indicate deaths, and the numbers of patients at risk are indicated at 7-day intervals along the x-axis. Survival of patients with smallpox from date of symptom onset.Ptop leftPPPtop rightPbottom leftPPPbottom right

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  1. Ann Intern Med December 17, 2002 vol. 137 no. 12 993-1000
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