"should be limited" amid the coronavirus pandemic, saying outbreaks in young people have stemmed from those activities."We are learning that many outbreaks in young people are related to youth sports and extracurricular activities," Walensky said."According to CDC guidance, these activities should be limited," Walensky continued, adding that "if they are not, the risk of clusters can be prevented with cadence testing strategies, as are being rolled out in so many different places."Walensky said that as schools are reopening for students and as young people continue to participate in their extracurricular activities, it is "even more important" that the public stricly adhere to CDC guidance.RELATED: UK variant a 'brand new ballgame,'.