LAG3 and infection: Half of the rabbits (Group-1; n = 10) were treated with a combination of blocking α-PD-1 and α-LAG-3 mAbs, injected intravenously (i.v.)on days -3, -5, -7 before infection and then on days 3, 5, and 7 post-infection (p.i.)at 200 μg/dose.