1. What is a sexually transmitted infection?

sexually transmitted infection (STI), also known as a sexually transmitted disease (STD), is an infection that is passed from one person to another through sexual contact. This can include infections that are transmitted through vaginal, anal, or oral sex. Some common examples of STIs include chlamydia, gonorrhea, syphilis, human immunodeficiency virus (HIV), herpes simplex virus (HSV), human papillomavirus (HPV), and trichomoniasis. Many STIs can cause symptoms such as pain, itching, sores, or unusual discharge, but some people may not experience any symptoms at all. It is important to practice safe sex and get tested regularly to prevent the spread of STIs and to seek treatment if necessary.