l diagnosis is made, confirmed patients are categorized into mild, moderate, severe, and critical types, based on the severity of disease (Zu et al., 2020).

5.3  COVID‐19 detection tests: Pathogenic laboratory testing, real‐time RT‐PCR, and sequencing of nucleic acid
Table 3 (Ai et al., 2020; Bai et al., 2020; Chen, Zhao, et al., 2020; Shi et al.