Add Yahoo as a preferred source to see more of our stories on Google. Koalas are an endangered species. This was not always the case, as the wild, adorable marsupials were once widespread across the ...

Chlamydia is often called a “silent infection” because many people don’t know they have it. It’s caused by a type of bacteria called Chlamydia trachomatis and can affect both men and women. While it’s ...

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 ...

A vaccine has been approved to help protect koalas against chlamydia, a measure researchers are hailing as a world-first in fighting the disease that is a leading cause of death for the beloved ...