The outbreak of coronavirus disease 2019 (COVID‐19) was caused by a type of beta coronavirus (Zhou et al., 2020), named as severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) on February 11, 2020. The disease quickly spread across China and beyond. As of July 31, 2020, over 17.1 million confirmed cases including 668,910deaths were reported worldwide (World Health Organization, 2020a). At present, the diagnosis depends on reverse transcription-polymerase chain reaction (RT-PCR) or gene sequencing from throat swab, sputum, or lower respiratory tract secretion (Li et al., 2020).
