Chlamydia infection is a common sexually transmitted infection in humans caused by the bacterium Chlamydia trachomatis. Chlamydia is a major infectious cause of human genital and eye disease. Chlamydia infection is one of the most common sexually transmitted infections worldwide. Chlamydia can be transmitted during vaginal, anal, or oral sex, and can be passed from an infected mother to her baby during childbirth. The major research centers for Chlamydia is NIAID research center at the Institute's Rocky Mountain Laboratories in Hamilton, Montana. They have progress in developing vaccine for chlamydia. Few of the other research centers are Max Plank Institute, Queensland University of Technology, University Of Southhampton etc.