TFF2 and infection: No significant difference was observed (a) between vehicle and SP-A1 or SP-A2 treatment prior to infection (Figure 7B), (b) between vehicle and SP-A1 or SP-A2 treatment at the time of infection (Figure 7C), or (c) between vehicle and SP-A1 or SP-A2 treatment prior to infection and at the time of infection (Figure 7D).