According to McCord (2003), researchers seek evidence to demonstrate that a prevention program is effective but should not rely on asking if it works as some treatments cause harm. McCord (2003) stressed that safety concerns are as important as efficacy. Furthermore, McCord (2003) believed that social harm may come at a higher cost than physical harm. McCord (2003) claimed there was a strong bias in reporting adverse effects of social programs that caused harm. Despite a prevention program’s best efforts, it can still cause some potential harm.