Gross, but this stuff has to be documented; money quote:
CDC’s new estimates show that there are about 20 million new infectionsin the United States each year, costing the American healthcare systemnearly $16 billion in direct medical costs alone.America’s youth shoulder a substantial burden of these infections.CDC estimates that half of all new STIs in the country occur amongyoung men and women. In addition, CDC published an overall estimateof the number of prevalent STIs in the nation. Prevalence is the totalnumber of new and existing infections at a given time. CDC’s new datasuggest that there are more than 110 million total STIs among men andwomen across the nation.
....Because some STIs – especially HIV – require lifelong treatment and care, they are by far the costliest. In addition, HPVis particularly costly due to the expense of treating HPV-related cancers. However, the annual cost of curable STIs is alsosignificant ($742 million). Among these, chlamydia is most common and therefore the most costly.
Read the whole thing here.