IL13 and infection: However, this impairment was not sustained during the course of infection as it disappeared at subsequent infection time points (U = 6, P = 0.6857; U = 1, P = 0.4 for IL-5 and U = 3, P = 0.2; U = 1, P = 0.4 for IL-13 at 9 and 12 wpi, respectively; Fig. 2a, b).