Figure 1From: A clinical prediction rule for diagnosing human infections with avian influenza A(H7N9) in a hospital emergency department setting Risk of influenza A(H7N9) infection stratified by risk categories. Note: Tertile 1 represents a risk score of 68 to 70, tertile 2 represents a risk score of 71 to 90, tertile 3 represents a risk score of >90.Back to article page