Fig. 6.

Alpha diversity analysis in symptom severity and illness duration. A. Change in alpha diversity as measured by Faith's phylogenetic diversity of the salivary microbiome comparing the values before SARS-CoV-2 infection in 81 subjects with those obtained during and after infection, according to the severity of their symptoms. Kruskal–Wallis test with Dunn's post hoc test FDR-correct p-values: ∗p < 0.05 B. Alpha diversity as measured by Faith's PD of the salivary microbiome of 79 SARS-CoV-2 infected subjects in samples obtained before, during, and after infection, according to the duration of the clinical illness. Mann–Whitney U test p-values: ∗p < 0.05. Before samples were obtained 14 ± 14 days before infection, early after were 14 ± 14 days after infection, and late after 154 ± 7 days after infection.