Fig. 2: Older adults have more severe COVID-19 and higher SARS-CoV-2 viral loads.

(a) Age distribution of the participant cohort. (b, c) Box plot showing the relationship between patients’ age and (b) trajectory group severity or (c) mortality. (d) Nasal swab SARS-CoV-2 viral load at Visit 1 (reads per million (rpM) measured by metatranscriptomics) in each age group. In (b-d), P-values were calculated using Kruskal-Wallis test. (e) Nasal swab SARS-CoV-2 viral load over time in each age group. P-value was calculated with generalized additive mixed effects modeling.