“Late teens to mid-late 20s, if you have a lot of partners, if you're having anonymous partners, those are things that are all going to increase your risk, depending on the sexual activity you engage. And that's also going to increase risk. Are you using condoms because condoms are going to be your number one way to go and prevent any STIs," said Lindsey Szatanek, a public health educator for the Bureau of Disease Control.

She said regardless of the type of sexual activity someone is engaging in, they need to get tested.

“It doesn't matter if your partner has said that they got tested over the summer before they came back to school. One of the biggest things that we air on is just taking control of your sexual health and getting tested," Szatanek said.

Getting tested is more than just providing a urine sample. Szatanek said more people should have blood tested as other infections can be found that way.

One such infection is syphilis, which has been on the rise.

“Chances are going to be one of your primary symptom, and that's where the virus actually went into the body in that spot. But it's going to be a pain with chancre. So if we're talking about, you know, our reproductive body parts, if you have a painless chancre and it's in a spot that you can't see, you wouldn't know that you have that spot of infection," said Szatanek.

There are medications that can help prevent STIs as well.

The World Health Organization says global HIV, viral hepatitis epidemics and STIs cause 2.5 million deaths each year.