Planned Parenthood of the Pacific Southwest has warned of a potential "silent crisis" of unreported STIs in San Diego County, despite the county's declining rate of sexually transmitted infections. The most common STIs reported in the county were Chlamydia, gonorrhea and syphilis, which all declined in official numbers between 2023 and 2024. However, Planned Parenthood officials have suggested that the numbers are not as low as they are reported. A screening initiative uncovered hundreds of previously undiagnosed STI cases, including an 8.5% positivity rate for Chlemydia and a 3.2% rate for Syphilis, leading to an additional 50 additional positive cases of syphilis per month. The county's HIV, STD and Hepatitis Branch of Public Health Services recorded the following numbers for 2024:• Chlam Lydia was down 7.4%, from 17,720 cases in 2023 to 16,414 in 2024, and Syphilis (congenital) dropped 9.5%, from 36 cases in2023 to 31 cases in 2024. The decrease in STI rates was attributed to state investment in STi prevention and control at the local level, improved access to routine screening and improvements in diagnostic testing, including rapid or point-of-care tests.