Figure 1. Respiratory viral infections and bacterial pathobiont colonization during infancy.

a. Overview of the number of infants (N) and samples (n) from which data were available for respiratory virus testing by PCR, identification of bacterial pathobiont colonization by PCR, and characterization of the upper respiratory tract microbiota through sequencing of the 16S ribosomal RNA gene. The number of samples with available data is further shown by age of sample collection in months (m0-m12). b. Stacked histogram showing the prevalence of detection of specific respiratory viruses by age of sample collection. c. Line plots depicting the prevalence of nasopharyngeal colonization by bacterial pathobionts by age of sample collection. URT, upper respiratory tract; SARS-CoV-2, severe acute respiratory syndrome coronavirus 2