Antibiotic treatment, when taken as directed cures chlamydia infections. If antibiotics are not taken properly, the infection will not be cured. Prompt treatment prevents the spread of the infection and reduces the risk of complications.
It is important to not have sex for 7 days after starting treatment for chlamydia. If you are treated for chlamydia and your sex partner is not, you will probably become infected again, so encourage your partner to get tested and treated before resuming sex.
Having a chlamydia infection that was cured does not protect you from a future infection. A new exposure to chlamydia will reinfect you, even if you were treated and cured.