Experts say many factors have contributed to the rapid rise, though the biggest one may be less frequent condom use. It’s less clear whether dating apps, like Tinder, have contributed in some way to the spread of STDs, though some researchers think they have.
“We have seen steep and sustained increases over the last five years,” said Dr. Gail Bolan, director of the Division of STD Prevention at the CDC. “Usually there are ebbs and flows, but this sustained increase is very concerning. We haven’t seen anything like this for two decades.”