CDC的最新数据说明新冠变异对年轻人，少年人危险系数大增，

In the first three months of the year, CDC researchers found that nearly one-third of adolescents hospitalized with Covid required admission into an intensive care unit. Meanwhile, 5% needed invasive mechanical ventilation. To be sure, CDC data shows no teenagers in the U.S. died of Covid in the first quarter of 2021.

www.cnbc.com/amp/2021/06/04/rise-in-adolescent-covid-hospitalizations-is-reflection-of-new-variants-gottlieb-says.html