Sexually transmitted infections (STIs) are infections that are primarily transmitted through sexual contact (e.g., vaginal, anal, or oral intercourse). The STIs with the most substantial public health impact in the United States include human immunodeficiency virus (HIV), hepatitis B virus infection (HBV), herpes simplex virus (HSV) 1 and 2, human papillomavirus (HPV), Chlamydia trachomatis, Neisseria gonorrhea, Treponema pallidum (syphilis), and...