Sexually transmitted diseases

This is an online tutorial on basic information about STDs.  Watch the presentation and then click on "Your Knowledge" to check your knowledge on STDs.

Κάντε κλικ στον σύνδεσμο http://www.nlm.nih.gov/medlineplus/tutorials/sexuallytransmitteddiseases/htm/_no_50_no_0.htm για να ανοίξετε τον πόρο.