Figure 2From: Novel genetic reassortants in H9N2 influenza A viruses and their diverse pathogenicity to miceMean changes in body weight of mice infected with H9N2 viruses. BALB/c mice were inoculated i.n. with each of eight H9N2 viruses at a dose of 107 EID50. The body weights were monitored daily for a 14-day observation period and expressed as a percentage of the initial value. The data represents the mean of four mice in each group.Back to article page