STDs: What Are They and How Do You [not] Get Them? By Everyday Health. Listen to the ► Podcast at How To Sex. This episode deals with the following STD concerns:  Chlamydia, Genital Herpes, Gonorrhea, Hepatitis B, HIV, HPV, Molluscum Contagiosum, Syphilis, Trichomoniasis, Chlamydia, Genital Herpes, Gonorrhea, Hepatitis B, HIV, HPV, Molluscum Contagiosum, Syphilis, Trichomoniasis. The number of cases of sexually transmitted diseases (STDs), now more commonly referred to as sexually transmitted infections (STI), in the United States hit an all-time high in 2019, according to data released on April 13, 2021, by the Centers for Disease Control and Prevention (CDC). The CDC’s surveillance report shows that nearly 2.5 million new cases of gonorrhea, syphilis, and chlamydia were reported that year. Chlamydia remained the most common condition reported to the CDC, with close to 1.8 million cases, up 19 percent since 2015. Gonorrhea diagnoses reached 616,392, up 56 percent since 2015. ...