The use of a condom is essential to protect yourself and your partners against STDs. If you have any concerns, you should have an STD screening test. In the event of an infection, follow the treatment correctly and inform your sexual partners.
In Belgium the number of cases has been increasing since the 90s (24% each year).
Syphilis does not generate immunity. An infected person who has been cured can become reinfected afterwards: 25% of cases of syphilis reported each year concern reinfections.