Is PrEP to blame for the rise in sex-related infections?

Chlamydia trachomatis bacteria. (Image: KATERYNA KON / SCIENCE PHOTO LIBRARY)

Sexually transmitted infections (STIs) are rebounding in developed countries after being firmly in retreat for decades. The consequences can be devastating. Syphilis, for example, causes more than 200,000 stillbirths and infant deaths worldwide annually, and years later can lead to blindness…