Sexually transmitted infections (STIs)
Overview 4 of these are currently treatable: syphilis, gonorrhea, chlamydia, and trichomoniasis. There are 4 other viral infections that are incurable: hepatitis B, herpes simplex virus (HSV or herpes), HIV, and human papillomavirus (HPV). STIs are primarily spread through sexual contact, including vaginal, anal, and oral sex. In 2020, WHO estimates 374 million new infections …







