Sexually transmitted infections, including HIV and blood-borne viruses Annual report with overview of the epidemiology of diseases based on 2012 data: Chlamydia Chlamydia is the most frequently reported sexually transmitted infection (STI) in the European Union and European Economic Area (EU/EEA). In 2012, 384 105 cases of chlamydia were reported in 25 EU/EEA Member States.…