TNFRSF8 and influenza: Although we did not exhaustively look at different time points or effector cytokines, the finding that LCMV clone 13 viral load did not change and that lack of CD30 did not affect protective immunity to influenza challenge, as evidenced by mouse survival and ability of CD8 T cells to persist and re-expand, makes it unlikely that CD30 plays a role in the immune response to these viruses.