Chlamydia is a sexually transmitted infection that affects millions of people worldwide. It's caused by the bacterial strain Chlamydia trachomatis and is most commonly spread through unprotected sex. Unfortunately, many individuals with chlamydia may not even know they have it, as symptoms often go unnoticed or are mistaken for something else.

Some common symptoms of chlamydia in women include painful urination, abnormal vaginal discharge, and bleeding between periods. Men may experience painful urination or discharge from the penis. In some cases, these symptoms may not show up for weeks or months after initial exposure to the bacteria. However, just because someone does not experience any noticeable symptoms does not mean they do not have chlamydia - this is why regular STI testing is crucial for sexually active individuals.