Following infection, plasma levels of FGL2 in wild-type C57BL/6 mice increased from a baseline of 0.8 ng/mL to a peak of 7.8 ng/mL at day 8 and remained elevated to day 50 post-infection.76 In order to characterize further the role of FGL2 in LCMV WE, we infected both wild-type and fgl2−/− mice. Here, FGL2 is linked to infection.