Since serial monogamists only date one person at a time, they may have a false sense of sexual health safety. They, like others, can be at an increased risk of contracting an STD or passing an asymptomatic STD onto others if they are not responsible about safer sex and STD testing.
Even serial monogamists who are consistent about STD testing may be at risk since some diseases, such as HIV, may remain undetectable for a long time.

