Think twice before you have that one night stand in Baltimore. According to a new report, Baltimore Maryland has the highest rate of sexually transmitted infections in the United States. The most common infection was chlamydia. To be exact the city of Baltimore had 7,636 cases of chlamydia, 4,231 cases of gonorrhea, 210, cases of syphilis, and 207 HIV cases.
Jackson, Mississippi came in second, followed by Philadelphia and San Francisco.