Approximately 1 in 5 adults in the US had a sexually transmitted infection in 2018. Khalil Ghanem, MD, PhD, of Johns Hopkins University joins JAMA Deputy Editor Mary McDermott, MD, to discuss the newest recommendations regarding the diagnosis and treatment of sexually transmitted infections, including gonorrhea, chlamydia, syphilis, Mycoplasma genitalium, and trichomoniasis. Related Content: Diagnosis and Treatment of Sexually Transmitted Infections