Probiotics for Preventing Upper Respiratory Tract Infections in Adults: A Systematic Review and Meta-Analysis of Randomized Controlled Trials

Figure 3

Forest plot of study results comparing probiotics with placebo groups: (a) the incidence of URTI episodes; (b) the rate ratio of episodes of URTIs; (c) the mean duration of one episode of URTI; (d) the rate ratio of the occurrence rate of adverse events.

(a)

(b)

(c)

(d)