http://www.cdc.gov/std/gonorrhea/stdfact-gonorrhea.htm
http://www.cdc.gov/std/herpes/stdfact-herpes.htm
http://www.cdc.gov/std/chlamydia/stdfact-chlamydia.htm
http://www.cdc.gov/std/syphilis/stdfact-syphilis.htm
http://www.cdc.gov/std/hpv/stdfact-hpv.htm
http://www.cdc.gov/std/herpes/stdfact-herpes.htm
http://www.cdc.gov/std/chlamydia/stdfact-chlamydia.htm
http://www.cdc.gov/std/syphilis/stdfact-syphilis.htm
http://www.cdc.gov/std/hpv/stdfact-hpv.htm