Sexually Transmitted Infections*

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The University of Wisconsin Population Health Institute Model of Health

Use the model to explore the measures of how long and how well we live and what shapes these trends. Select a measure in the diagram or browse the list of all measures.

Measures marked with an asterisk (*) are not included in summary calculations for Population Health and Well-being or Community Conditions.

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Number of newly diagnosed chlamydia cases per 100,000 population. The 2025 Annual Data Release used data from 2022 for this measure.

Chlamydia incidence rates are associated with unsafe sexual activity. Chlamydia is the most common bacterial sexually transmitted infection (STI) in North America and is one of the major causes of tubal infertility, ectopic pregnancy, pelvic inflammatory disease, and chronic pelvic pain.1 Every year, around three million teenagers contract an STD, with females aged 15 to 19 facing the highest risk compared to other age and gender groups. STIs are associated with a significantly increased risk of morbidity and mortality, including increased risk of cervical cancer, infertility, and premature death.2 STIs also have a high economic burden on society. This measure is also significant to health equity as chlamydia disproportionally affects underserved communities, particularly minoritized adolescent women.3

Find strategies to address Sexually Transmitted Infections*

The University of Wisconsin Population Health Institute Model of Health

Use the model to explore the measures of how long and how well we live and what shapes these trends. Select a measure in the diagram or browse the list of all measures.

Measures marked with an asterisk (*) are not included in summary calculations for Population Health and Well-being or Community Conditions.

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Data and methods

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2025

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