Figure 1

Weight loss and mortality of mice inoculated with different 2009/H1N1 virues in mice. Six-week-old BALB/c mice were inoculated intranasally with 10³TCID₅₀ viruses, with 10 mice per group. The mice that lost 25% of its preinoculation body weight were humanely euthanized with quick cervical dislocation and the data were expressed as the survival percentage of mice infected with 10³TCID₅₀ viruses (A). Body weight of mice infected with of each virus was measured for 14 dpi (B).