Sexually transmitted infections, or STIs, include both sexually transmitted diseases, known as STDs, and the many infections that don’t progress to disease. STIs are caused by more than 30 different ...

There are more than 20 types of sexually transmitted infections (STIs), but some are more prevalent than others — namely, chlamydia, which is the most common STI caused by bacteria. (HPV, also known ...

NEW YORK (Reuters Health) - A large number of people between the ages of 14 and 39 years have chlamydia, a sexually transmitted disease, a new report indicates, while gonorrhea, another STD, is less ...

As the United States reckons with a burgeoning sexually transmitted disease crisis, a broadening chorus of public health experts are calling for the Centers for Disease Control and Prevention to ...

See more of our trusted coverage when you search. Prefer Newsweek on Google to see more of our trusted coverage when you search. The bacteria that causes chlamydia, a common sexually transmitted ...

New cases fell by half in just over a year, San Francisco health officials reported. By Apoorva Mandavilli Reporting from the Conference on Retroviruses and Opportunistic Infections in Denver. A ...

STIs are particularly common among young people, with health experts saying testing for them is vital.

A Chlamydia vaccine showed promising results in an early-stage clinical trial conducted by researchers in the U.K. and Denmark. The early phase of the research found the experimental vaccine to be ...

Add Yahoo as a preferred source to see more of our stories on Google. Chlamydia is the most common STI caused by bacteria, but because it's typically asymptomatic, many people can have it and not know ...