Percent mortality and pathogenicity in DBA/2J mice infected with various subtypes of avian influenza A viruses (at 106 EID50).

aThe survival score was calculated as 0.8× (survival AUC/maximum AUC).bThe weight loss score was calculated as 0.2× (weight loss AUC/maximum AUC).cThe total pathogenicity score is the sum of the survival and weight loss scores.dPathogenicity indexes were classified as follows: 3, moderately pathogenic; 2, low pathogenic;1, least pathogenic; and 0, nonpathogenic.