Fig. 2From: Does waterfall aerosol influence mucosal immunity and chronic stress? A randomized controlled clinical trialIgA levels of all groups. Antigen-specific salivary IgA levels of responders. Linear mixed model (LMM1) of both intervention groups compared to the control group. Significance are indicated by p values. Data are shown in percentage change (±SD) from baseline (pre-serum)Back to article page