Chlamydia is a sexually transmitted infection. It is the most common illness reported to Public Health in New Brunswick and to health authorities in Canada. It particularly affects males and females aged 15 to 29. Chlamydia is being called the silent epidemic because most people affected do not have symptoms and keep transmitting the infection to others. In New Brunswick, at least one in 10 women and one in 20 men aged 20 to 24 have had chlamydia.