Serum 50% neutralizing inhibition titers were significantly greater in the Ad-HA/NP+Ad-IL-1β group (1:704) compared to pH1N1-infected (1:256) and Ad-HA/NP-immunized animals (1:200) 14 days post-infection (Figure 1F), while no significant differences in neutralizing activity were detected in BAL. The gene discussed is IL1B; the disease is infection.