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. 2013 Aug 22;121(10):1187–1193. doi: 10.1289/ehp.1306748

Table 1.

The number of mice tested at each time point for each treatment group.

Treatment group No. of days PI
>3 >7 >21 >49
Control 12 20 21 18
Arsenic 15 20 20 20
Control plus influenza 13 17 16 19
Arsenic plus influenza 13 20 16 17
PI, post­infection. Intranasal inoculation with 104.2 pfu influenza A/Mem71 (H3N1) or mock-infected cells occurred at 1 week of age.