STIs in Europe: Gonorrhea and syphilis hit record highs / Syphilis: Did Christopher Columbus bring the STD to Europe? / STD epidemic slows as new syphilis and gonorrhea cases fall in US / STD rates skyrocket among Americans 55 and older: CDC / Sexual health: Social media users warned about STI myths / America’s STD explosion laid bare: As Houston records unprecedented rise in syphilis, DailyMail.com’s interactive maps show how infections are soaring across the board