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. 2022 Dec 1;17(1):e13074. doi: 10.1111/irv.13074

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© 2022 The Authors. Influenza and Other Respiratory Viruses published by John Wiley & Sons Ltd.

This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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SARS‐CoV‐2 viral load by prior immunity and age. Prior immunity was measured as serostatus (A and B) and anti‐spike titer (C and D). Each data point represents an infection. Violin plots (A and C) show the distribution of viral load, by each level of immunity; horizontal lines indicate median CT values and printed numbers represent mean CT values. Asterisks in (C) indicate mean CT values significantly different from those in the negative group (p < 0.05). Line plots (B and D) are fitted with a loess smoother and shaded regions represent 95% confidence intervals.