Unprotected sex has no age.
Jurberg
Claudia
C
D000367:Age Factors; D001364:Awareness; D001938:Brazil; D015658:HIV Infections / Q000209:etiology* / Q000517:prevention & control; D006293:Health Promotion; D006801:Humans; D008875:Middle Aged; D012307:Risk Factors; D047568:Unsafe Sex