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To identify the impact of the COVID-19 pandemic on chlamydia infection in South Korea, we assessed the incidence rate ratio (IRR) for three different periods (epidemiological weeks 4–19, 20–33 and 34–46) using the weekly number of chlamydia infections between January 2018 and December 2020 from Korean national surveillance (figure 1).1
During the early pandemic period, overall incidence was similar to the previous 2 years (2018/2019); however, overall reduction was estimated to be 15%–30%, with a larger impact in males in the latter pandemic period.
The IRR decreased during period 2 in young adult males inside the Seoul Capital Area, possibly affected by COVID-19 outbreak from a nightclub in Seoul. The IRR largely decreased in males and females inside the Seoul Capital Area during period 3, likely caused by the ban on adult entertainment sector inside the Seoul Capital Area (from 18 August 2020 to 12 October 2020).2
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This research was conducted as a part of the project of Community Medicine and Practice 2021 at Konyang University College of Medicine, Daejeon, South Korea.
Handling editor Anna Maria Geretti
SC and SR contributed equally.
Funding This work was supported by the Basic Science Research Program through the National Research Foundation of South Korea funded by the Ministry of Education (NRF-2020R1I1A3066471).
Competing interests None declared.
Provenance and peer review Not commissioned; externally peer reviewed.