In multivariate logistic regression, the eosinophil cell count (adjusted odds ratio per 10-cell decrease, 1.09; 95% CI, 1.04 to 1.16; P = 0.002; frequency of significance in 1,000 bootstrap samples, 100%) and the CRP level (adjusted odds ratio per 1-point increase, 1.01; 95% CI, 1.00 to 1.01; P= 0.019; frequency of significance in 1,000 bootstrap samples, 98%) were found to be independent predictors of infection. The gene discussed is CRP; the disease is infection.