Nearly 2% of teenagers and young adults in the U.S. are infected with chlamydia, according to an MMWR article. In the National Health and Nutrition Examination Survey, 8300 participants aged 14 to 39 provided a urine sample that was tested for C. trachomatis. Overall, chlamydia prevalence was 1.7%. Among those for whom routine screening is recommended — sexually active females aged 14 to 24 — the prevalence was 4.7%. The prevalence was nearly 14% in sexually active, non-Hispanic black females aged 14 to 24 years. The prevalence decreased with increasing age. As chlamydia is common and infections are usually asymptomatic, health care providers should routinely screen sexually active young women aged