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Decrease in the incidence of chlamydia infection during the COVID-19 pandemic in South Korea
  1. Seokyoung Chang1,
  2. Sukhyun Ryu1,
  3. Dasom Kim1,
  4. Byung Chul Chun2
  1. 1 Department of Preventive Medicine, Konyang University College of Medicine, Daejeon, South Korea
  2. 2 Department of Preventive Medicine, Korea University College of Medicine, Seoul, South Korea
  1. Correspondence to Dr Sukhyun Ryu, Department of Preventive Medicine, Konyang University College of Medicine, Daejeon 35365, South Korea; gentryu{at}

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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

Figure 1

The 2018/2019–2020 incidence rate ratios (IRR) for chlamydia infections in different genders, age groups and regions in South Korea. Error bars represent the 95% CIs of the estimated coefficients for …

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  • 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.