“…15---17 Accordingly, prevention efforts targeting adolescents require emphasis on parental involvement. Moreover, intervening with adolescents and parents together has been shown to reduce risk behaviors, 18,19 leading intervention researchers to call for efforts to bring parents and adolescents together for at least 1 session. 20 Although there is consensus regarding the importance of the multiple phases of adolescence in terms of HIV prevention, 8 there is no consensus as to when adolescent interventions should be delivered: in preadolescence or early adolescence (ages 10 to 13 years, prior to the onset of most risk behavior, including consensual sexual activity), during midadolescence (ages 14 to 16 years, when some risk taking and experimenting has been initiated), or later in adolescence (ages 17 to 20 years, when many of the situations confronting youths are no longer theoretical).…”