According to the Centers of Disease Control and Prevention (CDC), consistent and correct use of male latex condoms can reduce (though not eliminate) the risk of a sexually transmitted disease. To achieve the maximum protective effect, condoms must be used both consistently and correctly. Inconsistent use can lead to a person contracting an STD because transmission can occur with a single act of intercourse with an infected partner. The most reliable ways to avoid transmission of sexually transmitted diseases (STDs), including human immunodeficiency virus (HIV), are to abstain from sexual activity or to be in a long-term mutually monogamous relationship with an uninfected partner. However, many infected persons may be unaware of their infections because STDs are often asymptomatic or unrecognized.