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. 2022 Sep;122:215–221. doi: 10.1016/j.ijid.2022.05.039

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© 2022 The Authors

This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).

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Bivariate relationships between epidemic metrics among outbreaks reported at the second-level administrative units. This figure shows the correlations between different epidemic metrics for second-level administrative unit outbreaks, including outbreak threshold, mean reproductive number during the first epidemic week, attack rate, duration, time to outbreak peak and CFR. The marginal histograms show the distributions of individual metrics (The attack rate, weekly incidence per 100,000 people, and CFR are in log scale, whereas other characteristics are in linear scale). Panel A shows the correlation between time to outbreak peak (week) and outbreak duration (week). Panel B shows the correlation between outbreak threshold (i.e., weekly incidence per 100,000 people) and attack rate per 1000 people. Panel C shows the correlation between mean reproductive number during the first epidemic week and attack rate per 1000 people. Panel D shows the correlation between time to outbreak peak (week) and attack rate per 1000 people. Panel E shows the correlation between outbreak duration (week) and attack rate per 1000 people. Panel F shows the correlation between CFR (%) and attack rate per 1000 people. CFR = case fatality risks.