Fig. 1.

Boxplots comparing bacterial diversity and richness at 9 months (white color) and 18 months (grey color) between individuals with or without older siblings (a, b), furred pets (c, d) and early life infections (e, f). Boxes show 25^th to 75^th percentiles and whiskers indicate minimum to maximum values. Statistical significance was evaluated by Mann Whitney test, using p < 0.05 as measure of significance. ns = not significant, however p-values below 0.1 are shown