“…Constantine and Jerman (2007) found that most parents wanted to vaccinate their children by the 13 years of age, but some would not consider such vaccination before their children reach 16 years of age. Other studies have shown that parents were more likely to accept the vaccine if they had an older daughter in her late teens (Ferris, Horn, & Waller, 2010;Marlow, Waller, & Wardle, 2007a, 2007b.…”