1. Syphilis
2. Syphilis
3. Centers for Disease Control and Prevention.Sexually Transmitted Disease Surveillance 2021. Atlanta GA: Department of Health and Human Services; April 11 2023. Available from:https://www.cdc.gov/std/statistics/2021/default.htm[Last accessed September 10 2023].
4. Syphilis in Deutschland im Jahr 2019 – Neuer Höchststand von Infektionen;Jansen K;Epid Bull,2020