Chlamydia - Annual Epidemiological Report for 2021

For 2021, 27 EU/EEA Member States reported 184 542 confirmed cases of chlamydia infection. The crude notification rate was 74 cases per 100 000 population.

National notification rates for cases of chlamydia infection varied considerably across the EU/EEA. This is a probable reflection of the differences in chlamydia testing, case finding strategies and reporting rather than actual epidemiological differences in chlamydia distribution.

Notification rates continue to be highest among young adult heterosexual women.

Notification rates increased from 2012 to 2019, but decreased in 2020 and 2021, probably due to decreased health seeking and testing during the COVID-19 pandemic in combination with reductions in risk behaviours during this period.