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Dear Editor,rnSARS-CoV-2 causes a spectrum of illness,ranging from an asymptomatic state to life-threatening multi-organ failure,and imposes a high socioeconomic burden on its sufferers and on society(Chen et al.2020;Pan et al.2020).Asymptomatic SARS-CoV-2 infection,confirmed by assay with quantitative real-time reverse transcription PCR(qRT-PCR),presented neither clinical symptom nor radiographic abnormality(Pan et al.2020).