Which virus is the most common viral STD in the US?

• A. HSV
• B. HIV
• C. CMV
• D. HPV

Answer: (D)

HPV is the most common viral STD in the United States. It spreads primarily through sexual contact, and many infections are asymptomatic, so people can transmit the virus without noticing any signs. With over 100 HPV types, most infections clear on their own, but the large number of people infected across the population makes HPV far more prevalent than the other viruses listed. HSV and HIV are serious STDs as well, but their overall prevalence is lower, and CMV, while common in the general population, is not primarily acquired as an STD. The combination of widespread transmission via skin-to-skin contact during sex and frequent asymptomatic carriage explains why HPV tops the list. Vaccination against several high-risk HPV types also helps reduce associated cancers.