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. 2023 May 22;120(22):e2221887120. doi: 10.1073/pnas.2221887120

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Copyright © 2023 the Author(s). Published by PNAS.

This open access article is distributed under Creative Commons Attribution-NonCommercial-NoDerivatives License 4.0 (CC BY-NC-ND).

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Fig. 3. — Observed and corrected differences in incubation-period distributions of Delta and Omicron variants. (A) Posterior median estimates of the observed (backward) incubation periods of the Delta (black) and Omicron (orange) variants by ref. 4. (B) Forward incubation-period distributions assuming r = −0.05/d and r = 0.15/d for the Delta (black) and Omicron (orange) variants, respectively. (C and D) Corrected estimates of the mean forward incubation period for different assumptions about the growth rates of the Delta (C) and Omicron variants (D). Lines represent median estimates. Shaded regions represent the corresponding 95% confidence intervals.