FIG 2.

Duck (Anseriformes) origin H7 viruses cause greater mean mortality and weight loss in mice than shorebird (Charadriiformes) origin viruses. (A) The mean survival of mice inoculated with duck origin viruses was significantly less than that of mice inoculated with shorebird origin viruses and similar to that of mice inoculated with A/Anhui/1/2013 (H7N9). (B) Mean weight loss in mice inoculated with duck origin viruses was significantly greater on days 6 to 9 postinfection than that of mice inoculated with shorebird origin viruses and was similar to the mean weight loss in mice inoculated with A/Anhui/1/2013 (H7N9). *, P < 0.05; **, P < 0.01; ***, P < 0.001; ns, not significant. Error bars indicate standard errors of the means (SEM).