For everyone who has an active and varied sex life with changing partners, regular testing for STI is advisable, especially in the case of: • symptoms that indicate the presence of an STI • a confirmed or suspected STI Diagnosis in partners • a suspected or actually contagious sexual contact of the partner, the partner with third parties • unprotected sexual contact in connection with sex work • unprotected sexual contact with people from countries with high STI -Frequency • regular unprotected sexual contact with several partners, female partners • beginning of a new partnership