Chlamydia Hard to say, easy to catch. REZAL Chlamydia is a common & curable sexually transmitted infection (STI). Many people experience no symptoms. If you are sexually active, make STI testing part of your regular health routine. Find a testing location near you: gettested.cdc.gov Public Health IOWA HHS Chlamydia Hard to say , easy to catch . REZAL Chlamydia is a common & curable sexually transmitted infection ( STI ) . Many people experience no symptoms . If you are sexually active , make STI testing part of your regular health routine . Find a testing location near you : gettested.cdc.gov Public Health IOWA HHS