The CDC just released STI Surveillance Data for 2024 that show cases of chlamydia, gonorrhea, and syphilis are slowly declining. Some highlights from the report include:

• The combined total number of cases of chlamydia, gonorrhea, and syphilis was down 9% from 2023. This was the third year in a row that we saw a decline.
• The number of chlamydia cases was down 8% since 2023. This was the second year in a row that we saw a decline.
• The number of gonorrhea cases was down 10% since 2023. This was the third year in a row that we saw a decline.
• The number of cases of primary and secondary syphilis was down 22% since 2023. This was second year in a row we saw a decline.

These numbers suggest the United States is making progress in stemming the surging STI epidemic by promoting widespread screening and new prevention methods such as doxy PEP. While this progress is great, there were still 2.2 million cases reported to the CDC in 2024 which represents a 13% increase from a decade ago.

The data also show that congenital syphilis remains one of the biggest public health concerns. Congenital syphilis occurs when syphilis infection is passed from mother to child during pregnancy or birth. This can cause miscarriage, stillbirth, and even infant death. Babies born with syphilis can face lifelong medical issues. Congenital syphilis can be prevented by testing all women during pregnancy and providing treatment if needed. The alarming rise in congenital syphilis in recent years shows big gaps in prenatal care across the country.

In 2024 there were 4,000 cases of congenital syphilis reported which represents a 1.6% increase from 2023. This was much less of an increase than we’ve seen in recent years, but it was still the 12th year in a row that cases of congenital syphilis increased. Moreover, the number of cases is up 700% from a decade ago.

The CDC only released national data from 2024 and considers these numbers provisional. The agency has been working internally and with health departments across the country to update the surveillance system. This has meant delays in collecting and analyzing data. We don’t yet have state data or breakdowns based on demographics like race and ethnicity.

Still, the CDC believes the national data it has released can help inform ongoing STI prevention efforts on the national, state, and local. Full results won’t be available until 2026, and the CDC notes that these provisional data might change slightly at that time.