How common is chlamydia in the united states?

Very common. Chlamydia is a very, very common std in the unites states. In fact, it is one of the most common std's in younger patients (ages 18 to 35). It is easily treated with oral medications.
CHLAMYDIA. Here a link about prevelance www.Nlm.Nih.Gov/medlineplus/chlamydiainfections.Html.