COVID-19 study found that 0.4% of 5730 asymptomatic children aged 0-18 years tested positive for virus before hospital procedures or admission

一项针对新冠病毒的研究发现，在5730名0至18岁的无症状儿童中，0.4%的人在接受医院手术或入院前病毒检测呈阳性。