Early and consecutive RT-PCR tests with both oropharyngeal swabs and sputum could improve testing yield for patients with COVID-19: An observation cohort study in China

by Yangzi Song, Chen Chen, Yu Wang, Ju Zhang, Meiling Chen, Guiju Gao, Sa Wang, Di Yang, Rui Song, Linghang Wang, Wen Xie, Fengting Yu, Liting Yan, Yajie Wang, Hui Zeng, Fujie Zhang
Published 2021-06-01