Using a condom to protect from STI and HIV has been demonstrated in both laboratory and epidemiologic studies. Check out this study from the Center for Disease Control and Prevention called “Condom Fact Sheet in Brief.”

A condom only works if you use it, and it works best if you use it right. Use of external condoms, internal condoms, and dental damsall take part in reducing the risk of sexually transmitted infections (STIs) and HIV. Always use a condom because many infected individuals may be unaware of their infection because STIscan be asymptomatic (no symptoms) and unrecognized.

Research shows that condoms (internal or external) are an effective barrier for even the smallest sexually transmitted infections. To achieve maximum protection by using condoms, they must be used consistently and correctly.Inconsistent or incorrect use of condoms can lead to STI acquisition because transmission can occur with a single sex act with an infected partner.

Dental dams also have an important role in reducing the spread of STIs. Dental dams can be used to act as barrier in oral sex. Dental dams reduce your risk of spreading bodily fluids that may carry STIs.