Enrichment of 
LRTI
To further explore the connection between gut microbiota and LRTI, we shotgun-sequenced fecal samples from the infants with LRTI (cases) and their matched controls (Fig. First, we focused on Actinobacteria, the dominant phylum in both cases and controls during the first 6 months of life. Metagenomic sequence reads were classified into 35 Next, we focused on 