CDC Set to Finalize 2024 STI Data in 2026, Confirming Third Straight Year of Decline

January 12, 2026

The Centers for Disease Control and Prevention says its provisional 2024 sexually transmitted infection data, expected to be finalized sometime in 2026, shows the combined total of chlamydia, gonorrhea, and syphilis cases fell 9% from 2023 — the third consecutive year of decline.

Even with the drop, more than 2.2 million STI cases were reported nationally in 2024, a figure still 13% higher than a decade ago, according to CDC's surveillance report. Chlamydia cases fell 8% and gonorrhea fell 10% compared with 2023, while primary and secondary syphilis — the most infectious stages of the disease — declined 22%.

Congenital syphilis, however, continued its now 12-year streak of annual increases, with nearly 4,000 cases reported in 2024, according to the American Sexual Health Association's review of the CDC data. That figure is roughly 700% higher than a decade ago.

CDC officials have pointed to expanded screening and newer prevention tools, including doxycycline post-exposure prophylaxis (doxy-PEP), as contributing factors in the overall decline. Public health advocates have cautioned that continued progress depends on sustained funding for STI prevention programs at the federal, state, and local level.

Because the 2024 data remains provisional, CDC has not yet released detailed state-level or demographic breakdowns; those are expected alongside the final report later in 2026.

Anyone unsure where their own testing stands relative to a recent exposure can use the STD Testing Window Period & Panel Calculator to check which infections are already reliably testable.

Sources: CDC STI Statistics, American Sexual Health Association.